Advanced Computer Architecture Assignment Example | Topics and Well Written Essays - 2000 words

Advanced Computer Architecture - Assignment Example ent day context, microprocessors are used as integrated devices with the aim of performing numerous functions like text editing, communication, multimedia display and calculation. These can be identified as important devices especially for computers. Specially mentioning, microprocessors can perform information-processing tasks in an effective manner. It is usually considered as an information-processing device performing different tasks with the assistance of embedded programs. Microprocessors are developed in an identical manner to that of the advancement of integrated circuits. The structure of microprocessors can be viewed as quite complex. They are developed through a procedure of deposition along with removal of insulating, semi conducting as well as conducting materials (Cankaya, n.d.). In this regard, the report intends to discuss about the currently used microprocessors that include Core i3 of Intel, Phenom II of AMD and QuadCore of VIA technologies. Additionally, a detailed analysis and comparison would be conducted between the aforesaid microprocessors in relation to their design, cost, performance and energy consumption among others. Core i3 is regarded as the 3rd Generation microprocessor, which has been proven to be quite effective in its performance for embedded ‘22nn Tri-gate transistor technology’. Additionally, the processor possesses Intel HD Graphics 4000, which assists in providing better visuals and developing performances with enhanced efficiency. The processor with the assistance of innovative as well as enhanced media capabilities is able to convert videos at increased speed and provides better gaming experience. The processor is facilitated with ‘Intel Turbo Boost Technology 2.0’, which aids in performing additional tasks in a speedy way. Moreover, ‘Intel Hyper-Threading Technology 1’ enables each core of the microprocessor to perform two tasks simultaneously. In this regard, the Core i3 processor facilitates in multitasking,

Issues and Dilemmas of Contemporary Public Administration WK 6 Term Paper

Issues and Dilemmas of Contemporary Public Administration WK 6 - Term Paper Example The behavioral responsibility is also undertaken subjectively where the considerations are based on unfulfilled responsibilities, and lack of moral recognition and authority. These offer conduits for identifying primary goals and major purposes reflected in the invoked public domain characterization. The assertions made by Bang, (1999) indicate that policies needed to support the implementation of government programs are aided by administrative responsibility. Ethical codes of conduct that are ideally required have been seldom and this has impacted negatively on public administration. The image that the society is being painted with is based on the ethical responsibility and unethical values have led to poor performance. Further, public morality is directed towards achieving relevant results that also include identifying issues required to create adequate performance at various governmental levels. Privatization plays a crucial role in promoting public administration. The promotional aspect of public administration according to Bailey, (1996) is established by ensuring that efficiency and efficacy have been taken into consideration. Ultimately, the research process involves delivery quality services where privatization models are put into consideration. The identities made by Bang, (1999) show that privatization is fully embraced through good governance structures include defining new paradigms that help to create promotional transformation at organizational and cultural

History of the Latin Kings

History of the Latin Kings The History of the Latin Kings begins in the 1920s or 1930s, but at this time they were known under a different name. In the beginning of the 20th century a lot of Puerto Rican immigrants came to New York. A lot of groups were formed, such as Noble Knights (who have ties to todays Latin Kings) or Young Lords. The group still has connections to these gangs. The founder of the original Latin Kings is called Papa King or Papa Santos. He started the gang in the 1950s in Chicago. Although he is an important person in the history of Latin Kings you dont know much about him or his life. Even his birthday is unknown. He himself was a Young Lord. Due to oral stories the LK were formed on the Southside of Chicago on the corner of 18th and Wabash. During the 60s they became more and more successful and expended to the north. They grew faster and were the best organized gang these days. The Latin Kings worked with social workers, because they received government benefits from meeting them. Thats why they acted more and more bad to get more and more benefits, such as money, fun activities, etc. Today this system doesnt exist anymore, of course. Some gangs thought the LK were part of the Royal Kings, who had arguments with the so called Ambrose. As a consequence the Latin Kings and Ambrose became enemies. In the 1970 the LKs were often connected with major crimes and organized criminal activities. 1977/78 they were suspected for robbing an armory. The FBI arrested one member, who acknowledged that they had stolen military weapons. It was rumored that they sold them to different allied gangs. In the 1980s the LK convinced also white gangs to join the so called people alliance, formed with Vice Lords and Elrukns. In 1888 Papa King was killed. His followers were Lord Gino (of whom you say that he ordered Papa Kinds death) as the leader of the LKN in prison and Baby king as leader on the streets. Size and Ethnic Origin Since the 1990s theyre also spread in New York City and nowadays you can find them nearly everywhere in the US. The Latin Kings and Queens Nation is primary spread in Illinois, Texas, and Florida and of course in New York and Chicago. Although they have many allies they are still the third largest gang in Chicago and people say that it is the biggest and most influential Latino gang in the world. Experts guess that there are about 50.00 to 80.000 members world wide, but youll never find out the exact number. They often have Puerto Rican background, but during the last 20 years when they broadened to Europe, there became more and more people with also Hispanic, Portuguese or Italian background members. As in many gangs there are more male members than female. Structure and Organization Both, men and women, are allowed to become a member at the Latin Kings and Queens Nation has, as the name already says. They have a strict hierarchy and rules. It has always been important that the members have social responsibilities. Depending on their age they should have or search for a job or go to school. Education in general is quite important to the Nation. Thats why there are so called schoolings. Knowledge workers are people whose jobs focus on working with information and for whom a certain theoretical and analytical knowledge is important. Knowledge is not tied to any country it is portable and represents might, a typical LK ambition. They should also be interested in their ethnic background and family history and free or hard drugs to be able to mainly concentrate on their duties in the nation and not to drag down the other members. There are three stages of social responsibilities a member goes threw when he decides to be a Latin King: Primitive Stage: the King warrior acts very impulsive. Most of his time he does gang banging (engaging gang activities) or getting high. The Conservative or Mummy Stage: The member doesnt want to be on the streets and gets tired of being seen as big and bad. He gets married and retires. The New King Stage: The member sees himself as a new King, which means that he starts to recognize that the time of revolution is in his hand. When he becomes a new King the will of the Nation becomes his will. Everything starts to have a meaning to him and he only lives for the nation. They are well structured and known for their hierarchy. The leadership consists for example out of: Supreme Crown Authorities Executive Crown Authorities and Local Presidents in their respective prisons and communities. They are responsible for a particular area. Furthermore there are officers or leaders, the so called Incas that are each supported by a Crown Council of seven members. The gangs head is the so called Corona which means Crown. He is able to decide nearly everything, but is, of course, also responsible for every activity outside prison. At that time Gino Gustavo Colon is the leader of the Latin Kings. Rules Because of their strict hierarchy they need, as mentioned before, strict rules. There are ones for every part of their live. They are written in their bible, which is called the Kings Manifesto. For example they have rules how to communicate with other gang members.. A few official rules are: A brother never crosses his left over his right arm, he never covers his right hand, because it represents his crown. No member should take the law into his own hand, he isnt allowed to exploit any person inside or outside the nation, when a member gives another member a salute it always has to be returned. That rules are often highly ritualistic. Due to that the Latin Kings are very religious. They believe in Kingism, which includes their whole system. But they also believe in Yahweh, god, the almighty father, King of all Kings. He is also called the El of the Universe. A non religious LK youll find very rarely. The Nation says that also their name is an acronym and shows their devotion to Yahweh. Almighty stands for: A love measured in great harmony toward Yahweh In their Manifesto there are not only rules and regulations, but also prayers. There are 2 prayers in the beginning; one is called the holy prayer. They believe that Yahweh is the founder of the universe, of the Manifesto and the Kingism. This belief should give them faith in themselves. The Latin Kings say that theres a heaven and a soul that will meet Yahweh after death. In fact it has a great similarity to the Christian and Jewish believe. What Kingism exactly is does only a member of the Latin Kings and Queens Nation know. They have certain Kings, but if they are holy, imaginary persons or real historic figures, isnt clear. Punishments When a member does not stick to that rules he gets punished by his colleagues. Besides physical punishment it includes social exclusion and group harming. Their application varies in intensity and frequency whether its a Chicago or New Yorker Leader. They have a few different rules and their execution also depends on the leader. A non-physical punishment can be prohibition, which varies between 2 weeks and 2 month. Others can be fines, being isolated and so on and so forth. But, as everything in their lives, they also have strict rules for physical punishments. There are: three-minute physicals, as the name already explains three members punish for three minutes five-point violations, which means that there are 5 members of the leadership that punish the victim (they stand for the 5 points of the crown) or even T.O.S. It stands for Terminate on Sight and is a death penalty. The reasons for this last brutal action are treason, challenging a leadership or sadly just homosexuality. Symbols and Rituals As every gang they have specific colors you find on all their logos and tattoos. In this case they are black and yellow. The dark color represents death and stands in opposite to the light one, which represents life. They arent only included in their symbols, but also on their cloth. Their emblem is always five pointed, e.g. a star, a crown (sometimes worn by a lion) or anything else that shows this number. Their most recent emblem is the bulldog with a crown. You can say that the number five is holy to them, because they often use it in their philosophy. The LKs are known for their drawings and graffiti paintings. They use symbols such as A.L.K.Q.N (Almighty Latin King Queen Nation), A.L.K.Q.C.N (Charter Nation), A.D.R (Amor Deu Rei Love the Kings), guns, Coat of arms, money or cars. They sign places with graffiti where a gang member has fallen. On the graffiti the deceased persons ID-Number is shown, his/her name and the date of the death. If another gang is responsible for his/her death an upside down symbol of this gang is painted with the words Lollypop as a putdown for that gang. A very important thing for them is to learn to control their tongue. They believe that speaking of the control of the tongue is addressing the whole body. Thats what they want to learn. For that reason its not easy for the police to uncover their criminal activities they are faithful to their colleagues. Newspapers talk about special rituals to train themselves. Criminal Activities The LKs are known for not just using but also selling weapons. High ranking members often wear bullet proof vests, because of their enemies. Every member owns a weapon and they do not always carry them with them when they are on post. Its very hard to get information from them, because they are that faithful to their group. However, their primary source of income is dealing with drugs, such as cocaine, heroin and marijuana. The internet is full of stories about Latin Kings and their criminal activities including burglary, homicide, identity theft and money laundering. Reportedly also the police are corrupted. In 2011 two policemen had arrested drug dealers for fake, took their drugs and gave their proceeds to the Latin Kings. Statistics of the Chicago Police say that they find about 150 kilograms cocaine and 1000 kilogram marijuana a year in the Latin Kings region. Their Rival Gangs are the Latin Locos, Folk Nation gangs and the Solidos. Latin Queens Originally there were no female members allowed. Nowadays women get an equal share. They constituted, in addition to the male Kings, a few Queens. They join the gang for self-respect, independence, family support, ethnic identity and self-empowerment. Still they fill in female stereotypical roles and stay at home, mainly running the household, while the male members are fighting on the streets or dealing with drugs. They have a home life of protection. Reason for Becoming a Gang Member As Ive mentioned before a lot of women became members to feel safer. But still the Latin Kings and Queens Nation has more male members. They have a lot of influence in the world and the black market. That would be the main reason why people become members. In New York or Chicago they are common and young people are attracted by their philosophy and might. They often come from broken families and want to find a new one. Besides this its youll have no choice weather you want to be a LK or not when your parents already join them. On the other hand these kids grew up with the ideology of Kingism. They do not know anything else. Thats why the Latin Kings grow that fast. Due to this life in poverty seems to be a lot easier when you can relate on your gang and know that theyll support you even in prison. And of course you always have access to drugs and weapons, what favors young people the most. My Opinion When I started searching for information about the Almighty Latin Kings and Queens Nation I thought they where just one out of thousand Latin American gangs. But when I researched more I found their philosophy really fascinating. Kingism is not a religion I would personally agree with but I found it strange that so many people follow that few leaders and that there is such a strict hierarchy although everybodys talking about freedom. I wasnt surprised about their criminal activities and the stories about street wars or corrupt policemen do not really shock me. I expected that. Another think that was interesting is that although the LKs are so popular and even have their leaders in prison it is very hard to find out information about them. I had to concentrate on facts, but most of the sources are influenced by the gang itself, which forced me to read even more about them to stay subjective. A Latin Kings Poem NOT A DAY GOES BY THAT WE DONT REPRESENT THROWING UP THE CROWN WITH ALL OUR LOVE SHOUTING AMOR DE REY TILL WE DIE TO THE ALMIGHTY FATHER UP ABOVE BUSTING OUT IN OUR HOODS KEEPING THE LOVE ALIVE NEVER LETTING FLAKES DISRESPECT OUR EMBLEMS THAT WE MADE WITH SO MUCH PRIDE BUT AS ALL OF THIS IS HAPPENING WE ARE GETTING STRONGER AND STRONGER EACH DAY WATCHING SHORTIES JOIN AND OLDER BOYS RETIRE THEIR FLAG BUT AS ONE KING DROP HIS FLAG THERE IS A SHORTY TO PICK IT UP AS THE OLDER BOYS PASS THAT FLAG FROM AN OLD HAND TO A NEW ONE HE WILL GIVE HIM SOME WISE ADVISE KEEP THIS FLAG IN YOUR HEART AND NEVER LET IT DIE RESPECT AND HONOR THIS CROWN FOR IT I ONCE DID DIE FOR THIS CROWN AS OTHER KINGS /QUEENS DID EVER TAKE A BRO OR SIS NAME THAT DIED WITH RESPECT NOT UNLESS YOURE WILLING TO DIE LIKE HE / SHE DID LIKE A TRUE KING / QUEEN DIES IN THE BATTLE FIELD REMEMBER THOSE WHO DIED, GO TO THEIR GRAVE AND SHED NO TEARS BRING THEM SOME BIG ASS FLOWERS, TELL THEM THAT THEY DIDNT DIED IN VAIN!!!! DEDICATED TO THOSE WHO DIED AND THOSE WHO PASSED THE CROWN FROM AND TO HAND AND THOSE WHO STILL KEEP THE LOVE ALIVE Sources: http://www.chicagogangs.org/index.php?pr=LATIN_KINGS http://www.uic.edu/orgs/kbc/latinkings/latindex.html http://www.segag.org/ganginfo/frlkings.html http://books.google.at/books?id=rXeTZvvoJRQCpg=PA72lpg=PA72dq=latin+kings+Primitive+Stagesource=blots=t9YRCIsgAEsig=wB5LugquOM3UMuxflu0f-yaN9D0hl=enei=qr_FS7XlFKTuNLfItcQOsa=Xoi=book_resultct=resultredir_esc=y#v=onepageq=latin%20kings%20Primitive%20Stagef=false http://www.gangwar.com/items/items42.htm http://www.docstoc.com/docs/8387967/Chicago-Latin-Kings http://www.nwitimes.com/news/local/illinois/chicago/chicago-cops-accused-of-working-for-latin-kings-held-without/article_635f3dcd-f84c-5f0e-9695-757167d2c6eb.html

Metaphors We Live By :: George Lakoff Mark Johnson Language Essays

Metaphors We Live By In the book Metaphors We Live By, authors George Lakoff and Mark Johnson address the traditional philosophic view denouncing metaphor's influence on our world and our selves (ix). Using linguistic and sociological evidence, Lakoff and Johnson claim that figurative language performs essential functions beyond those found in poetry, clichà ©, and elaborate turns of phrase. Metaphor permeates our daily experiences - not only through systems of language, but also in terms of the way we think and act. The key to understanding a metaphor's effect on behavior, relationships, and how we make sense of our environment, can be found in the way humans use metaphorical language. To appreciate the affects of figurative language over even the most mundane details of our daily activity, it is necessary to define the term, "metaphor" and explain its role in defining the thoughts and actions that structure our conceptual system. According to Lakoff and Johnson, "the essence of metaphor is understanding and experiencing one kind of thing in terms of another" (5). This definition extends to any symbolic type of expressions, like the concept of hate, the spatial direction "up", or the experience of inflation. When our most important life experiences are often too abstract for basic understanding, we attempt to capture the nature of the experience by placing it in a relevant and more easily recognizable context. Three basic types of metaphor are used to, "conceptualize the less clearly delineated in terms of the more clearly delineated"(59). These are: the orientational metaphor, the ontological metaphor, and the structural metaphor. Orientational metaphor organizes concepts by giving them a spatial orientation. These metaphoric representations are not random; they are based on the structure of our bodies, and how we physically interact in a specific culture or environment. Metaphors like "I'm falling asleep," "he dropped dead," and, "You are under my control" provide a spatial relationship between the human subject and something found in the world. The authors explain that, while directional oppositions (up-down, in-out, front-back, etc.) are physical in nature, they aren't always the same for every culture. For example, while some cultures may see the future as ahead of us, others view it as behind us (14). Ontological metaphors involve ways of viewing intangible concepts, such as feelings, activities, and ideas as entities. When we identify these experiences as substances, we can "refer to them, categorize them, group them, and quantify them - and, by this means, reason about them" (25).

Mitosis Replication of Eukaryotic Cells

Exercise 13MITOSIS: REPLICATION OF EUKARYOTIC CELLS  ANSWERS TO QUESTIONS1.a. Mitosis and cytokinesis are often referred to collectively as â€Å"cellular division. † Why are they more accurately called cellular replication? The result of mitosis is production of two cells (replicates) identical to the parent cell. The genetic material is replicated rather than divided.b. Does the cell cycle have a beginning and an end? The organization of our study of cellular events indicates a beginning and end, but the events continue to repeat.2.a. If a nucleus has eight chromosomes during interphase, how many chromosomes does it have during metaphase? During metaphase there are 8 double-stranded chromosomes.b. How many does it have after mitosis is complete? After mitosis (and separation of chromatids) there are 16 chromosomes distributed between two nuclei.3.a. Why would we choose an embryonic mass of cells for procedure 13. 3 in which to study the stages of mitosis? embryonic cells a re replicating and growing rapidlyb. Which stage of mitosis most often is associated with the beginning of cytokinesis? usually late anaphase4.a. What region of a root has the most mitotic activity? meristem, just above capb. Why is pinching of the cytoplasm inadequate for cytokinesis in plant cells? Pinching of cytoplasm is not appropriate for rigid cell walls.c. Locate a plant cell in late telophase. What is the volume of the new cells relative to a mature cell? Each cell is smaller (approximately 1/2) than the parent cell.5.a. Why are the combined data from all the class members more meaningful than your results alone? Combined results reduce random error.b. How accurate were your predictions for length of each stage of mitosis? probably not closec. What sources of error can you list for this technique to determine the time elapsed during each stage of mitosis? ariation in onion roots; student's ability to distinguish stages; microscopic cross sections of roots may or may not pas s through the nuclear materialExercise 14MEIOSIS: REDUCTION DIVISION AND GAMETOGENESIS ANSWERS TO QUESTIONS1. a. Why would shuffling genetic material and producing new combinations of characteristics be advantageous to a species? New genetic combinations allow adaptation to changing environments.b. When would it be deleterious? New combinations always produce a percentage of disadvantageous characteristics; the risk of bad gene combinations may be inappropriate in a stable, beneficial environment.2. a.Synapsis occurs after chromosomal DNA has replicated. How many chromatids are involved in crossing-over of a homologous pair of chromosomes?b. Suppose synapsis occurred between two homologous chromosomes, and one had alleles for blue eyes and brown hair and the other had alleles for green eyes and blonde hair. How many different combinations of these alleles would be possible? 4 Remember that crossing-over does not necessarily occur between the loci, so the original combinations may re main intact. 3. a. If a nucleus has eight chromosomes when it begins meiosis, how many chromosomes does it have after telophase I? Telophase II? with two chromatids each; 4 with one chromatid eachb. What are the major differences between the events of meiosis and mitosis? (see table 14. 2)c. What are some minor differences, and why do you consider them minor? minor differences would be those unrelated to chromosomal events4. a. During gametogenesis a sperm cell undergoes considerable structural change. What are the basics of sperm structure and how does it relate to function? The basics include small head with nucleus; an acrosomal process with enzymes to digest the outer membranes of the egg; a head and neck rich in mitochondria; and tail used to propel the cell to the egg.b. What is the advantage of producing sperm in a system of tubes rather than in solid tissue? because sperm cells can be expelled easily from the body through a system of tubesc. What is each strand of a double-s tranded chromosome called? chromatid5. How would retaining extra cytoplasm enhance survival of a developing oocyte? More cytoplasm contains more nutrients to ensure survival.6. a. What are the relative sizes of oocytes in a dormant follicle, a growing follicle, and a Graafian follicle? dormant oocyte 1X, growing oocyte 5X, mature oocyte 25Xb. Are polar bodies visible in your prepared slide of a cat ovary? Why or why not? probably not, because cells in the ovary usually have not finished meiosis I, and polar bodies disintegrate rapidly DNA FINGERPRINTING LABRestriction Digestion of DNA Samples Observation QuestionsDescribe the samples of DNA (physical properties). The DNA samples are clear, colorless liquid samples.Is there any observable difference between the samples of DNA? No. All samples appear similar.Describe the appearance of the restriction endonuclease mix. The restriction enzymes appear to be clear, colorless liquids.Restriction Digestion of DNA Samples Review QuestionsBef ore you incubated your samples, describe any visible signs of change in the contents of the tubes containing the DNA combined with the restriction enzymes. DNA + EcoRI/PstI enzyme mix: No visible change apparent in the tubes.Can you see any evidence to indicate that your samples of DNA were fragmented or altered in any way by the addition of EcoRI/PstI? Explain. No. No visible change apparent in the tubes.In the absence of visible evidence of change, is it still possible that the DNA samples were fragmented? Explain your reasoning. Yes. They may be chemically changed but the changes may not be visible. Enzymes may have cut the DNA.After a 24 hour incubation period, are there any visible clues that the restriction enzymes may have in some way changed the DNA in any of the tubes? Explain your reasoning. No. No visible change apparent in the tubes but the enzymes may have cut the DNA. The reactions are at the molecular level and too small to be seen.Electrophoresis of Your DNA Samples Review QuestionsThe electrophoresis apparatus creates an electrical field [positive and negative ends of the gel]. DNA molecules are negatively charged. To which pole of the electrophoresis field would you expect DNA to migrate (+ or -)? Explain. Positive.What color represents the negative pole? Black.After DNA samples are loaded in wells, they are â€Å"forced† to move through the gel matrix. Which size fragment (large vs small) would you expect to move toward the opposite end of the gel most quickly? Explain. Smaller. There is less resistance to their movement through the gel matrix.Which fragments are expected to travel the shortest distance [remain closest to the well]? Explain. Larger. There is more resistance to their movement through the gel matrix.Lesson 4 Thought QuestionsWhat can you assume is contained within each band? DNA fragments.If this were a fingerprinting gel, then how many kinds (samples) of DNA can you assume were placed in each separate well? One.What wo uld be a logical explanation as to why there is more than one band of DNA for each of the samples? The DNA must have been cut into fragments by restriction enzymes.What probably caused the DNA to become fragmented? The chemical action of the restriction enzymes cutting at specific base sequences.Which of the DNA samples have the same number of restriction sites for the restriction endonuclease used? Write the lane numbers.Lanes 2, 3, and 4 (CS, S1, and S2).Which sample has the smallest DNA fragment? The sample in lane 5 (S3).How many restriction sites were there in lane three? Two sites that cut the sample into two fragments.Which DNA samples appear to have been â€Å"cut† into the same number and size of fragments? Lanes 2 and 4 (CS and S2).Based on your analysis of the photograph, what is your conclusion about the DNA samples in the photograph? Do any of the samples seem to be from the same source. If so which ones? Describe the evidence that supports your conclusion.The DN A samples in lanes 2 and 4 (CS and S2) are from the same individual because they have identical restrictions sites that yield identical fragments.DNA Fingerprinting: OverviewWhat are we trying to determine? Restate the central question. We are trying to determine if samples of DNA that we were provided with are from the same individual or from different individuals.Which of your DNA samples were fragmented? What would your gel look like if the DNA were not fragmented? The number of fragmented samples will vary. They will have one band on the gel if the DNA was not cut.What caused the DNA to become fragmented? The addition of restriction enzymes.What determines where a restriction endonuclease will â€Å"cut† a DNA molecule? A special sequence of bases on the DNA called restriction sites.A restriction endonuclease â€Å"cuts† two DNA molecules at the same location. What can you assume is identical about the molecules at that location? The restriction sites are identical .Do any of your suspect samples appear to have EcoRI or PstI recognition sites at the same location as the DNA from the crime scene? The samples in lanes 2 and 5 match (CS and S3).Based on the above analysis, do any of the suspect samples of DNA seem to be from the same individual as the DNA from the crime scene? Describe the scientific evidence that supports your conclusion. The CS and S3 samples appear to be identical. They both produce similar banding patterns on the gel.Exercise 23 SURVEY OF BACTERIA: KINGDOMS ARCHAEBACTERIA AND BACTERIA ANSWERS TO QUESTIONS1. a. Why is it important that bacteria release nutrients? Nutrients must be released and recycled for use by other living organisms. If nutrients were not released by decomposers, the nutrients would all eventually be locked up in dead, non-decaying tissue.b. What term would best describe heterotrophic bacteria that feed on living tissue? parasitism2. What is the shape and size of each bacterial colony? E. coli—medium rod; B. megaterium—large rod; R. rubrum—small and thin spirillum 3. a. Which type of bacteria is most prevalent in the sample from your teeth? How do you know? probably gram positive because most of the cells are purpleb. Is Bacillus megaterium gram positive or gram negative? gram positive4. a. Where are the bacteria? Are they between cells or inside cells? inside the cellsb. Why is this relationship between a plant and bacterium called mutualism? Both partners benefit from the association.c. How does Rhizobium benefit from this association? nutrients from the hostd. How does the host plant benefit from the association? nitrogen supply from the bacterium5. Based on their appearance, which drugs or chemicals retard the growth of bacteria? depends on the drugs that you use6. Do all cells of a trichome of Oscillatoria appear similar? yes7. a. Do adjacent cells share a common sheath? usuallyb. What do you suppose is the function of the sheath? protectionc. Do clusters of Gloeocapsa represent multicellular organisms? Why or why not?No, the cells are not obligate dependents—they can operate independently; the protoplasms of the cells are not connected; the aggregation of cells can be broken into individual cells without killing the cells.8. a. How is the shape of Merismopedia different from other cyanobacteria you studied in this exercise? Merismopedia is a flat, square colony one cell thick.b. How would a colony attain this shape? equal divisions in two planesExercise 24Survey of Kingdom Protista: The Algae ANSWERS TO QUESTIONS1. a. Is the movement of Chlamydomonas smooth or does it appear jerky? relatively smoothb. Can you see both flagella? You may need to reduce the light intensity to see flagella. probably not, depends on student's microscopec. How does methylcellulose affect movement of Chlamydomonas? slows it downd. How does the stigma help Chlamydomonas survive? detects light2. a. Under what environmental conditions would a zygote not u ndergo meiosis immediately? unfavorable conditionsb. Are spores of Chlamydomonas haploid or diploid? haploidc. Which portions of the life cycle of Chlamydomonas are haploid? all portions from meiosis to syngamyd. Which are diploid? all portions from syngamy to meiosis3. a. Are the filaments of Spirogyra branched? nob. What is the shape of the chloroplasts of Spirogyra? spiralc. Can you see any conjugation tubes? If you can't, examine the prepared slides that demonstrate these structures. probably not seen on live material, but easily seen on prepared materiald. How do you think that Spirogyra reproduces asexually? mitosis and fragmentation4. a. How is Cladophora morphologically similar to Spirogyra. How is it different? They are both filaments, but Cladophora is branched and Spirogyra is unbranched.b. What is the shape of its chloroplasts? broad and dispersed5. a. What is oogamy? ne gamete (sperm) is small and motile, the other gamete (egg) is larger and nonmotileb. What are the tin y spheres inside the larger sphere of Volvox? daughter coloniesc. How do you suppose they get out? Parent colonies turn inside out or rupture.d. How do you think the number of cells in a young Volvox colony compares to the number in a mature colony? less than or equal to the number in the mature colony6.a. How is Fucus' structure different from green algae that you have examined earlier in this exercise? Fucus is larger, more parenchymatous, and flattened.b. Are all portions of the thallus photosynthetic?How can you tell? probably not, due to different concentrations of pigmentsc. Considering where Fucus lives, what do you think is the function of its gelatinous sheath? Since Fucus lives in intertidal regions, the gelatinous sheath probably prevents desiccation.d. Are the swollen structures solid masses or are they empty? essentially empty7.a. Are the gametes of Fucus isogamous or oogamous? oogamousb. How does the structure of tissue surrounding the reproductive structures compare w ith that of green algae? Tissues in brown algae are more complex.8. a. Can you see any pores in the walls of diatoms? robably yesb. Are any of the diatoms moving? possiblyc. If diatoms lack flagella, how do you explain their motility? gliding on a gelatinous secretiond. How would diatomaceous earth compare to sand as a swimming pool filter material? Which would be better and why? Diatomaceous earth would be better because it is finer. How do the shapes of dinoflagellates compare with other unicellular algae that you have observed in this exercise? bizarre and varied What is the function of the eyespot of Euglena? detect lightExercise 25 SURVEY OF KINGDOM PROTISTA: PROTOZOA AND SLIME MOLDS ANSWERS TO QUESTIONS1. a. Can you detect moving cytoplasm in the extending pseudopods of Amoeba? probably yesb. What do you suppose the Amoeba is moving toward or away from? light or foodc. How does the Amoeba respond to nutrient broth? usually increased movementd. Approximately how long would it t ake an Amoeba to move across the field of view on low power? a few minutese. Why is a contractile vacuole of a protozoan often more difficult to see than a food vacuole? A contractile vacuole contains clear excretory fluid, while food vacuoles contain particulate matter.f. Why would excess water tend to accumulate in Amoeba? ecause solute concentration in the amoeba is higher than the concentration in the environment and water diffuses into the cell2. How could fossilized forams in different geological layers of rock or sediment indicate the probability of finding oil? Different species are present in different environmental conditions; therefore, a list of species may include those associated with environmental conditions appropriate for oil formation.3. a. How large is a trypanosome relative to an Amoeba? much smallerb. What alga does a trypanosome superficially resemble? Euglena4. a. Are cilia visible on living or prepared Paramecium? probably notb.Does Paramecium rotate as it mo ves? yesc. How does movement of Paramecium compare with that of Amoeba? With a flagellated alga? Paramecium moves much faster than Amoeba, but not as fast as many flagellated species.5. a. Why is the division of Paramecium cells called â€Å"transverse† fission? The plane of separation is transverse to the longitudinal axis.b. Why is transverse fission not a sexual process? it doesn't recombine genesc. What are the advantages and disadvantages of conjugation in Paramecium? disadvantages: conjugation requires more than one organism and is energy consuming advantage: creation of new genetic combinations6. a. What is the value or function of the rapid contraction stalk of Vorticella? avoid predationb. What is the probable function of the moving cilia of Vorticella? create water currents bringing food particles to the organism7. a. Is cytoplasmic movement of Physarum apparent? probably yesb. Is the movement in a particular direction? probably not, but on moist medium they may app arently move toward foodc. What is a possible function of cytoplasmic movement in Physarum? avoid light, find foodExercise 26 SURVEY OF KINGDOM FUNGI: MOLDS, SAC FUNGI, MUSHROOMS, AND LICHENS ANSWERS TO QUESTIONS1. a. Are hyphae present? ob. Are the cells motile? yes2. a. How many species of mold are on the bread? 2, 3, or 4b. Do any of the molds on the bread have hyphae modified as sporangiophores and sporangia? probably yesc. Is pigment distributed uniformly in each mycelium? If not, where is the pigment concentrated in each mold? No, pigment is usually concentrated in sporangia.d. What is the adaptive significance of spores forming on ends of upright filaments rather than closer to the protective substrate? to enhance distribution of released spores3. a. In what structure is the dark pigment of Rhizopus concentrated? sporangiab.Is Rhizopus reproducing sexually as well as asexually in the same petri dish? How can you tell? Yes (if students are provided with cultures with two strai ns); because sporangia as well as zygospores are visible.4. What is the relative size of Penicillium hyphae compared to Rhizopus hyphae? Penicillium hyphae are much smaller than Rhizopus hyphae.5. a. Do you see chains of yeast cells produced by budding? probably yesb. How is the structure of yeast hyphae different from that of molds? Yeast hyphae are greatly reduced to a chain of one or two cells, while molds are very long and multicellular. 6. What is the difference between dikaryotic and diploid cells? Dikaryotic cells have two distinct nuclei, each with a haploid (single) set of chromosomes; a diploid cell has one nucleus with a diploid (double set of chromosomes).7. How many spores would you estimate are present on the gills of a single cap of Coprinus? Remember that a prepared slide shows only a cross section. many, many thousands8. a. What is the value of photosynthetic algae to the growth of a fungus in a lichen? Algae conduct photosynthesis and produce an energy rich carbon source, (i. e. , glucose).b. Would you expect lichens to grow best in rural or urban environments? Why? best in rural environments because they are so sensitive to air pollutionExercise 27 SURVEY OF THE PLANT KINGDOM: LIVERWORTS, MOSSES, AND HORNWORTS OF PHYLA HEPATICOPHYTA, BRYOPHYTA, AND ANTHOCEROPHYTA ANSWERS TO QUESTIONS1. What are the functions of rhizoids? anchorage, possibly absorption2. What is the function of these pores? gas exchange3. How do the positions of the archegonium and antheridium relate to their reproductive function? Antheridia need to disperse sperm and are upright with pores on top of the antheridial disk; archegonia are protected under the surface of the archegonial disk.4. a. What is the function of the foot? nutrient transport from gametophyte to sporophyteb. Are spores haploid or diploid? haploidc. What is the functional significance of the response of elaters to moisture? dispersal of spores5. a. How many cells thick is the leaflet? one or twob. Is there a midrib? Vein? yesc. Are stomata or pores visible on the leaf surface? probably notd. How does the symmetry of a moss gametophyte compare with that of a liverwort gametophyte? Mosses are radially symmetrical and liverworts are bilaterally symmetrical. 6. a. How many times its own weight did the moss absorb? or more timesb. How does this compare with the paper towel? much greaterc. Why is Sphagnum often used in shipping items that must be kept moist? because it holds water so well7. Where is the egg located in the archegonium? egg is enlarged cell at base of neck8. Are sperm haploid or diploid? haploid9. Is the sporophyte more prominent in mosses or liverworts? mosses10. What is the adaptive significance of the seta of the sporophyte growing well above the mat of the gametophyte? better dispersal11. a. What process produces spores? meiosisb. Is the capsule haploid or diploid? diploid12. Can you think of any evolutionary implications of the similarity between a moss protonema and a filamentous green alga? both have similar form and live in similar habitat, which suggests that selective pressures for developing these structures may have been similarExercise 28 SURVEY OF THE PLANT KINGDOM: SEEDLESS VASCULAR PLANTS OF PHYLA PTEROPHYTA, LYCOPHYTA, PSILOPHYTA, AND SPHENOPHYTA ANSWERS TO QUESTIONS1.a. Which parts of the life cycle are haploid? gametophyteb. Which are diploid? sporophyte2.a. How many veins are present in each frond? usually 1 large veinb. What tissues compose a vein? ylem and phloemc. What is the function of the stalk? The blade? The pinnae? stalk—support; blade and pinnae—photosynthesis3.a. What is the function of an annulus? breaking point for opening sporangiumb. Are any spores in the sporangium? probably so4.a. Did the application of acetone cause the spores of the fern to disperse? probably yesb. How is the mechanism for spore dispersal in ferns similar to that of bryophytes? Moisture causes changes in cell (elater or annulus) shap e to release spores.5.a. Is the prothallium haploid or diploid? haploidb. Is the prothallium sporophyte or gametophyte? gametophyte6. a.What is the adaptive significance of having these structures on the lower surface of the prothallium rather than on the upper surface? protection from desiccationb. What is the adaptive significance of having sperm and egg produced at different times? discourages inbreeding7. How do Salvinia and Azolla differ from other ferns you've examined earlier? smaller, aquatic8. a. What type of branching characterizes Psilotum? dichotomousb. Are any roots present? noc. Are any leaves present? nod. Where are the sporangia? at end of short lateral branchese. Where does photosynthesis occur in Psilotum? stem9.a. Where are the leaves? n rings along stemb. What part of the plant is photosynthetic? stemc. Which part of the life cycle of Equisetum is dominant, the sporophyte or gametophyte? sporophyte10.a. How does strobili formation in Equisetum compare with Lycopo dium and Selaginella? sporangia of Lycopodium and Selaginella are on microphyllsb. How do elaters aid in the dispersal of spores? moves spores11. a. How could a rhizome be involved in asexual reproduction? produces new growth, which could be separated from parent plant (e. g. , via fragmentation), thereby resulting in a new individualb. How is a rhizome different from a rhizoid? hizome is underground stem; rhizoid is small, rootlike structurec. Does the rhizome have leaves? depends on specimen, but probably yesd. What is the shape and size of the leaves? thin, elongate, arranged in spiralse. What is the significance of this form of the leaves? intercept light for photosynthesisf. Is a midvein visible? yes g. What does the word â€Å"evergreen† mean? does not lose all of its leaves seasonallyh. Is â€Å"evergreenness† a good characteristic for classifying plants? Why or why not? No, unrelated plants are evergreen.12. a. How many sporangia occur on each sporophyll of Lyc opodium? oneb.Can you see why spores of Lycopodium are sometimes called â€Å"vegetable sulfur†? yesc. Why are the spores a good, dry lubricant? powdery; certain species produce some oild. Which is the dominant part of the Lycopodium life cycle, the sporophyte or gametophyte? sporophyte13. a. Are spores of Selaginella similar in size? nob. What is this condition called? heterosporousc. What is the functional significance of the difference in the appearance of dehydrated and rehydrated Selaginella? water conservation and survival during droughtd. Can you see why these plants are sometimes referred to as â€Å"resurrection plants†? yes Mitosis Replication of Eukaryotic Cells Exercise 13MITOSIS: REPLICATION OF EUKARYOTIC CELLS  ANSWERS TO QUESTIONS1.a. Mitosis and cytokinesis are often referred to collectively as â€Å"cellular division. † Why are they more accurately called cellular replication? The result of mitosis is production of two cells (replicates) identical to the parent cell. The genetic material is replicated rather than divided.b. Does the cell cycle have a beginning and an end? The organization of our study of cellular events indicates a beginning and end, but the events continue to repeat.2.a. If a nucleus has eight chromosomes during interphase, how many chromosomes does it have during metaphase? During metaphase there are 8 double-stranded chromosomes.b. How many does it have after mitosis is complete? After mitosis (and separation of chromatids) there are 16 chromosomes distributed between two nuclei.3.a. Why would we choose an embryonic mass of cells for procedure 13. 3 in which to study the stages of mitosis? embryonic cells a re replicating and growing rapidlyb. Which stage of mitosis most often is associated with the beginning of cytokinesis? usually late anaphase4.a. What region of a root has the most mitotic activity? meristem, just above capb. Why is pinching of the cytoplasm inadequate for cytokinesis in plant cells? Pinching of cytoplasm is not appropriate for rigid cell walls.c. Locate a plant cell in late telophase. What is the volume of the new cells relative to a mature cell? Each cell is smaller (approximately 1/2) than the parent cell.5.a. Why are the combined data from all the class members more meaningful than your results alone? Combined results reduce random error.b. How accurate were your predictions for length of each stage of mitosis? probably not closec. What sources of error can you list for this technique to determine the time elapsed during each stage of mitosis? ariation in onion roots; student's ability to distinguish stages; microscopic cross sections of roots may or may not pas s through the nuclear materialExercise 14MEIOSIS: REDUCTION DIVISION AND GAMETOGENESIS ANSWERS TO QUESTIONS1. a. Why would shuffling genetic material and producing new combinations of characteristics be advantageous to a species? New genetic combinations allow adaptation to changing environments.b. When would it be deleterious? New combinations always produce a percentage of disadvantageous characteristics; the risk of bad gene combinations may be inappropriate in a stable, beneficial environment.2. a.Synapsis occurs after chromosomal DNA has replicated. How many chromatids are involved in crossing-over of a homologous pair of chromosomes?b. Suppose synapsis occurred between two homologous chromosomes, and one had alleles for blue eyes and brown hair and the other had alleles for green eyes and blonde hair. How many different combinations of these alleles would be possible? 4 Remember that crossing-over does not necessarily occur between the loci, so the original combinations may re main intact. 3. a. If a nucleus has eight chromosomes when it begins meiosis, how many chromosomes does it have after telophase I? Telophase II? with two chromatids each; 4 with one chromatid eachb. What are the major differences between the events of meiosis and mitosis? (see table 14. 2)c. What are some minor differences, and why do you consider them minor? minor differences would be those unrelated to chromosomal events4. a. During gametogenesis a sperm cell undergoes considerable structural change. What are the basics of sperm structure and how does it relate to function? The basics include small head with nucleus; an acrosomal process with enzymes to digest the outer membranes of the egg; a head and neck rich in mitochondria; and tail used to propel the cell to the egg.b. What is the advantage of producing sperm in a system of tubes rather than in solid tissue? because sperm cells can be expelled easily from the body through a system of tubesc. What is each strand of a double-s tranded chromosome called? chromatid5. How would retaining extra cytoplasm enhance survival of a developing oocyte? More cytoplasm contains more nutrients to ensure survival.6. a. What are the relative sizes of oocytes in a dormant follicle, a growing follicle, and a Graafian follicle? dormant oocyte 1X, growing oocyte 5X, mature oocyte 25Xb. Are polar bodies visible in your prepared slide of a cat ovary? Why or why not? probably not, because cells in the ovary usually have not finished meiosis I, and polar bodies disintegrate rapidly DNA FINGERPRINTING LABRestriction Digestion of DNA Samples Observation QuestionsDescribe the samples of DNA (physical properties). The DNA samples are clear, colorless liquid samples.Is there any observable difference between the samples of DNA? No. All samples appear similar.Describe the appearance of the restriction endonuclease mix. The restriction enzymes appear to be clear, colorless liquids.Restriction Digestion of DNA Samples Review QuestionsBef ore you incubated your samples, describe any visible signs of change in the contents of the tubes containing the DNA combined with the restriction enzymes. DNA + EcoRI/PstI enzyme mix: No visible change apparent in the tubes.Can you see any evidence to indicate that your samples of DNA were fragmented or altered in any way by the addition of EcoRI/PstI? Explain. No. No visible change apparent in the tubes.In the absence of visible evidence of change, is it still possible that the DNA samples were fragmented? Explain your reasoning. Yes. They may be chemically changed but the changes may not be visible. Enzymes may have cut the DNA.After a 24 hour incubation period, are there any visible clues that the restriction enzymes may have in some way changed the DNA in any of the tubes? Explain your reasoning. No. No visible change apparent in the tubes but the enzymes may have cut the DNA. The reactions are at the molecular level and too small to be seen.Electrophoresis of Your DNA Samples Review QuestionsThe electrophoresis apparatus creates an electrical field [positive and negative ends of the gel]. DNA molecules are negatively charged. To which pole of the electrophoresis field would you expect DNA to migrate (+ or -)? Explain. Positive.What color represents the negative pole? Black.After DNA samples are loaded in wells, they are â€Å"forced† to move through the gel matrix. Which size fragment (large vs small) would you expect to move toward the opposite end of the gel most quickly? Explain. Smaller. There is less resistance to their movement through the gel matrix.Which fragments are expected to travel the shortest distance [remain closest to the well]? Explain. Larger. There is more resistance to their movement through the gel matrix.Lesson 4 Thought QuestionsWhat can you assume is contained within each band? DNA fragments.If this were a fingerprinting gel, then how many kinds (samples) of DNA can you assume were placed in each separate well? One.What wo uld be a logical explanation as to why there is more than one band of DNA for each of the samples? The DNA must have been cut into fragments by restriction enzymes.What probably caused the DNA to become fragmented? The chemical action of the restriction enzymes cutting at specific base sequences.Which of the DNA samples have the same number of restriction sites for the restriction endonuclease used? Write the lane numbers.Lanes 2, 3, and 4 (CS, S1, and S2).Which sample has the smallest DNA fragment? The sample in lane 5 (S3).How many restriction sites were there in lane three? Two sites that cut the sample into two fragments.Which DNA samples appear to have been â€Å"cut† into the same number and size of fragments? Lanes 2 and 4 (CS and S2).Based on your analysis of the photograph, what is your conclusion about the DNA samples in the photograph? Do any of the samples seem to be from the same source. If so which ones? Describe the evidence that supports your conclusion.The DN A samples in lanes 2 and 4 (CS and S2) are from the same individual because they have identical restrictions sites that yield identical fragments.DNA Fingerprinting: OverviewWhat are we trying to determine? Restate the central question. We are trying to determine if samples of DNA that we were provided with are from the same individual or from different individuals.Which of your DNA samples were fragmented? What would your gel look like if the DNA were not fragmented? The number of fragmented samples will vary. They will have one band on the gel if the DNA was not cut.What caused the DNA to become fragmented? The addition of restriction enzymes.What determines where a restriction endonuclease will â€Å"cut† a DNA molecule? A special sequence of bases on the DNA called restriction sites.A restriction endonuclease â€Å"cuts† two DNA molecules at the same location. What can you assume is identical about the molecules at that location? The restriction sites are identical .Do any of your suspect samples appear to have EcoRI or PstI recognition sites at the same location as the DNA from the crime scene? The samples in lanes 2 and 5 match (CS and S3).Based on the above analysis, do any of the suspect samples of DNA seem to be from the same individual as the DNA from the crime scene? Describe the scientific evidence that supports your conclusion. The CS and S3 samples appear to be identical. They both produce similar banding patterns on the gel.Exercise 23 SURVEY OF BACTERIA: KINGDOMS ARCHAEBACTERIA AND BACTERIA ANSWERS TO QUESTIONS1. a. Why is it important that bacteria release nutrients? Nutrients must be released and recycled for use by other living organisms. If nutrients were not released by decomposers, the nutrients would all eventually be locked up in dead, non-decaying tissue.b. What term would best describe heterotrophic bacteria that feed on living tissue? parasitism2. What is the shape and size of each bacterial colony? E. coli—medium rod; B. megaterium—large rod; R. rubrum—small and thin spirillum 3. a. Which type of bacteria is most prevalent in the sample from your teeth? How do you know? probably gram positive because most of the cells are purpleb. Is Bacillus megaterium gram positive or gram negative? gram positive4. a. Where are the bacteria? Are they between cells or inside cells? inside the cellsb. Why is this relationship between a plant and bacterium called mutualism? Both partners benefit from the association.c. How does Rhizobium benefit from this association? nutrients from the hostd. How does the host plant benefit from the association? nitrogen supply from the bacterium5. Based on their appearance, which drugs or chemicals retard the growth of bacteria? depends on the drugs that you use6. Do all cells of a trichome of Oscillatoria appear similar? yes7. a. Do adjacent cells share a common sheath? usuallyb. What do you suppose is the function of the sheath? protectionc. Do clusters of Gloeocapsa represent multicellular organisms? Why or why not?No, the cells are not obligate dependents—they can operate independently; the protoplasms of the cells are not connected; the aggregation of cells can be broken into individual cells without killing the cells.8. a. How is the shape of Merismopedia different from other cyanobacteria you studied in this exercise? Merismopedia is a flat, square colony one cell thick.b. How would a colony attain this shape? equal divisions in two planesExercise 24Survey of Kingdom Protista: The Algae ANSWERS TO QUESTIONS1. a. Is the movement of Chlamydomonas smooth or does it appear jerky? relatively smoothb. Can you see both flagella? You may need to reduce the light intensity to see flagella. probably not, depends on student's microscopec. How does methylcellulose affect movement of Chlamydomonas? slows it downd. How does the stigma help Chlamydomonas survive? detects light2. a. Under what environmental conditions would a zygote not u ndergo meiosis immediately? unfavorable conditionsb. Are spores of Chlamydomonas haploid or diploid? haploidc. Which portions of the life cycle of Chlamydomonas are haploid? all portions from meiosis to syngamyd. Which are diploid? all portions from syngamy to meiosis3. a. Are the filaments of Spirogyra branched? nob. What is the shape of the chloroplasts of Spirogyra? spiralc. Can you see any conjugation tubes? If you can't, examine the prepared slides that demonstrate these structures. probably not seen on live material, but easily seen on prepared materiald. How do you think that Spirogyra reproduces asexually? mitosis and fragmentation4. a. How is Cladophora morphologically similar to Spirogyra. How is it different? They are both filaments, but Cladophora is branched and Spirogyra is unbranched.b. What is the shape of its chloroplasts? broad and dispersed5. a. What is oogamy? ne gamete (sperm) is small and motile, the other gamete (egg) is larger and nonmotileb. What are the tin y spheres inside the larger sphere of Volvox? daughter coloniesc. How do you suppose they get out? Parent colonies turn inside out or rupture.d. How do you think the number of cells in a young Volvox colony compares to the number in a mature colony? less than or equal to the number in the mature colony6.a. How is Fucus' structure different from green algae that you have examined earlier in this exercise? Fucus is larger, more parenchymatous, and flattened.b. Are all portions of the thallus photosynthetic?How can you tell? probably not, due to different concentrations of pigmentsc. Considering where Fucus lives, what do you think is the function of its gelatinous sheath? Since Fucus lives in intertidal regions, the gelatinous sheath probably prevents desiccation.d. Are the swollen structures solid masses or are they empty? essentially empty7.a. Are the gametes of Fucus isogamous or oogamous? oogamousb. How does the structure of tissue surrounding the reproductive structures compare w ith that of green algae? Tissues in brown algae are more complex.8. a. Can you see any pores in the walls of diatoms? robably yesb. Are any of the diatoms moving? possiblyc. If diatoms lack flagella, how do you explain their motility? gliding on a gelatinous secretiond. How would diatomaceous earth compare to sand as a swimming pool filter material? Which would be better and why? Diatomaceous earth would be better because it is finer. How do the shapes of dinoflagellates compare with other unicellular algae that you have observed in this exercise? bizarre and varied What is the function of the eyespot of Euglena? detect lightExercise 25 SURVEY OF KINGDOM PROTISTA: PROTOZOA AND SLIME MOLDS ANSWERS TO QUESTIONS1. a. Can you detect moving cytoplasm in the extending pseudopods of Amoeba? probably yesb. What do you suppose the Amoeba is moving toward or away from? light or foodc. How does the Amoeba respond to nutrient broth? usually increased movementd. Approximately how long would it t ake an Amoeba to move across the field of view on low power? a few minutese. Why is a contractile vacuole of a protozoan often more difficult to see than a food vacuole? A contractile vacuole contains clear excretory fluid, while food vacuoles contain particulate matter.f. Why would excess water tend to accumulate in Amoeba? ecause solute concentration in the amoeba is higher than the concentration in the environment and water diffuses into the cell2. How could fossilized forams in different geological layers of rock or sediment indicate the probability of finding oil? Different species are present in different environmental conditions; therefore, a list of species may include those associated with environmental conditions appropriate for oil formation.3. a. How large is a trypanosome relative to an Amoeba? much smallerb. What alga does a trypanosome superficially resemble? Euglena4. a. Are cilia visible on living or prepared Paramecium? probably notb.Does Paramecium rotate as it mo ves? yesc. How does movement of Paramecium compare with that of Amoeba? With a flagellated alga? Paramecium moves much faster than Amoeba, but not as fast as many flagellated species.5. a. Why is the division of Paramecium cells called â€Å"transverse† fission? The plane of separation is transverse to the longitudinal axis.b. Why is transverse fission not a sexual process? it doesn't recombine genesc. What are the advantages and disadvantages of conjugation in Paramecium? disadvantages: conjugation requires more than one organism and is energy consuming advantage: creation of new genetic combinations6. a. What is the value or function of the rapid contraction stalk of Vorticella? avoid predationb. What is the probable function of the moving cilia of Vorticella? create water currents bringing food particles to the organism7. a. Is cytoplasmic movement of Physarum apparent? probably yesb. Is the movement in a particular direction? probably not, but on moist medium they may app arently move toward foodc. What is a possible function of cytoplasmic movement in Physarum? avoid light, find foodExercise 26 SURVEY OF KINGDOM FUNGI: MOLDS, SAC FUNGI, MUSHROOMS, AND LICHENS ANSWERS TO QUESTIONS1. a. Are hyphae present? ob. Are the cells motile? yes2. a. How many species of mold are on the bread? 2, 3, or 4b. Do any of the molds on the bread have hyphae modified as sporangiophores and sporangia? probably yesc. Is pigment distributed uniformly in each mycelium? If not, where is the pigment concentrated in each mold? No, pigment is usually concentrated in sporangia.d. What is the adaptive significance of spores forming on ends of upright filaments rather than closer to the protective substrate? to enhance distribution of released spores3. a. In what structure is the dark pigment of Rhizopus concentrated? sporangiab.Is Rhizopus reproducing sexually as well as asexually in the same petri dish? How can you tell? Yes (if students are provided with cultures with two strai ns); because sporangia as well as zygospores are visible.4. What is the relative size of Penicillium hyphae compared to Rhizopus hyphae? Penicillium hyphae are much smaller than Rhizopus hyphae.5. a. Do you see chains of yeast cells produced by budding? probably yesb. How is the structure of yeast hyphae different from that of molds? Yeast hyphae are greatly reduced to a chain of one or two cells, while molds are very long and multicellular. 6. What is the difference between dikaryotic and diploid cells? Dikaryotic cells have two distinct nuclei, each with a haploid (single) set of chromosomes; a diploid cell has one nucleus with a diploid (double set of chromosomes).7. How many spores would you estimate are present on the gills of a single cap of Coprinus? Remember that a prepared slide shows only a cross section. many, many thousands8. a. What is the value of photosynthetic algae to the growth of a fungus in a lichen? Algae conduct photosynthesis and produce an energy rich carbon source, (i. e. , glucose).b. Would you expect lichens to grow best in rural or urban environments? Why? best in rural environments because they are so sensitive to air pollutionExercise 27 SURVEY OF THE PLANT KINGDOM: LIVERWORTS, MOSSES, AND HORNWORTS OF PHYLA HEPATICOPHYTA, BRYOPHYTA, AND ANTHOCEROPHYTA ANSWERS TO QUESTIONS1. What are the functions of rhizoids? anchorage, possibly absorption2. What is the function of these pores? gas exchange3. How do the positions of the archegonium and antheridium relate to their reproductive function? Antheridia need to disperse sperm and are upright with pores on top of the antheridial disk; archegonia are protected under the surface of the archegonial disk.4. a. What is the function of the foot? nutrient transport from gametophyte to sporophyteb. Are spores haploid or diploid? haploidc. What is the functional significance of the response of elaters to moisture? dispersal of spores5. a. How many cells thick is the leaflet? one or twob. Is there a midrib? Vein? yesc. Are stomata or pores visible on the leaf surface? probably notd. How does the symmetry of a moss gametophyte compare with that of a liverwort gametophyte? Mosses are radially symmetrical and liverworts are bilaterally symmetrical. 6. a. How many times its own weight did the moss absorb? or more timesb. How does this compare with the paper towel? much greaterc. Why is Sphagnum often used in shipping items that must be kept moist? because it holds water so well7. Where is the egg located in the archegonium? egg is enlarged cell at base of neck8. Are sperm haploid or diploid? haploid9. Is the sporophyte more prominent in mosses or liverworts? mosses10. What is the adaptive significance of the seta of the sporophyte growing well above the mat of the gametophyte? better dispersal11. a. What process produces spores? meiosisb. Is the capsule haploid or diploid? diploid12. Can you think of any evolutionary implications of the similarity between a moss protonema and a filamentous green alga? both have similar form and live in similar habitat, which suggests that selective pressures for developing these structures may have been similarExercise 28 SURVEY OF THE PLANT KINGDOM: SEEDLESS VASCULAR PLANTS OF PHYLA PTEROPHYTA, LYCOPHYTA, PSILOPHYTA, AND SPHENOPHYTA ANSWERS TO QUESTIONS1.a. Which parts of the life cycle are haploid? gametophyteb. Which are diploid? sporophyte2.a. How many veins are present in each frond? usually 1 large veinb. What tissues compose a vein? ylem and phloemc. What is the function of the stalk? The blade? The pinnae? stalk—support; blade and pinnae—photosynthesis3.a. What is the function of an annulus? breaking point for opening sporangiumb. Are any spores in the sporangium? probably so4.a. Did the application of acetone cause the spores of the fern to disperse? probably yesb. How is the mechanism for spore dispersal in ferns similar to that of bryophytes? Moisture causes changes in cell (elater or annulus) shap e to release spores.5.a. Is the prothallium haploid or diploid? haploidb. Is the prothallium sporophyte or gametophyte? gametophyte6. a.What is the adaptive significance of having these structures on the lower surface of the prothallium rather than on the upper surface? protection from desiccationb. What is the adaptive significance of having sperm and egg produced at different times? discourages inbreeding7. How do Salvinia and Azolla differ from other ferns you've examined earlier? smaller, aquatic8. a. What type of branching characterizes Psilotum? dichotomousb. Are any roots present? noc. Are any leaves present? nod. Where are the sporangia? at end of short lateral branchese. Where does photosynthesis occur in Psilotum? stem9.a. Where are the leaves? n rings along stemb. What part of the plant is photosynthetic? stemc. Which part of the life cycle of Equisetum is dominant, the sporophyte or gametophyte? sporophyte10.a. How does strobili formation in Equisetum compare with Lycopo dium and Selaginella? sporangia of Lycopodium and Selaginella are on microphyllsb. How do elaters aid in the dispersal of spores? moves spores11. a. How could a rhizome be involved in asexual reproduction? produces new growth, which could be separated from parent plant (e. g. , via fragmentation), thereby resulting in a new individualb. How is a rhizome different from a rhizoid? hizome is underground stem; rhizoid is small, rootlike structurec. Does the rhizome have leaves? depends on specimen, but probably yesd. What is the shape and size of the leaves? thin, elongate, arranged in spiralse. What is the significance of this form of the leaves? intercept light for photosynthesisf. Is a midvein visible? yes g. What does the word â€Å"evergreen† mean? does not lose all of its leaves seasonallyh. Is â€Å"evergreenness† a good characteristic for classifying plants? Why or why not? No, unrelated plants are evergreen.12. a. How many sporangia occur on each sporophyll of Lyc opodium? oneb.Can you see why spores of Lycopodium are sometimes called â€Å"vegetable sulfur†? yesc. Why are the spores a good, dry lubricant? powdery; certain species produce some oild. Which is the dominant part of the Lycopodium life cycle, the sporophyte or gametophyte? sporophyte13. a. Are spores of Selaginella similar in size? nob. What is this condition called? heterosporousc. What is the functional significance of the difference in the appearance of dehydrated and rehydrated Selaginella? water conservation and survival during droughtd. Can you see why these plants are sometimes referred to as â€Å"resurrection plants†? yes

NSU Financial Aid Essay

Your impression about NSU FINANCIAL AID in comparison with the best Universities of home and abroad Private University Act was authorized in 1992 which obligates private universities to offer scholarships of its poor but worthy students. This act is followed by most of the private universities; however some universities go beyond and do more than the minimum requirements to comply with this act. Among these liberal universities is North South University. Every year, NSU grants a total of around more than 500 students’ full or partial scholarships. Some other private universities like BRAC University, Independent University, Bangladesh (IUB), East West University also has financial aiding opportunities for their students. While they offer generous and reasonable aid to students, they do not seem as enthusiastic as NSU in this program. Researching personally, I found that their websites are not equally as helpful and informative as NSU’s website. NSU’s website provides detail information about the requirements and procedures to apply for financial aid. EWU provides aid either during admissions or after completing one whole year. While BRACU did not state how it aids its current students based on performance. IUB offers aid only through admissions and not on university performance. Abroad, only USA provides good financial support for foreign student. Other countries provide very limited offer to international students. For example Universities in Australia are only lenient in providing scholarship to students who holds Australian passport. Universities like Harvard, MIT and Yale offer full scholarships on needs and merit basis. But then again, universities like Harvard, MIT and rest of the Ivy League colleges, what are the chances for an international student from this part of the world. Also abroad universities/colleges in USA, Canada provide financial assistances for students who may not be academically talented but talented in other fields like sports, music, drama and other activities. However, neither NSU nor any other private universities have this opportunity provided for their students. After going through the whole application process, I found the process to some extent smooth except for collection the form from the bank and also standing in the long queue for four hours just to submit my form. Aid is offered among the highest scorers of the admission test, the current students who perform well and has a healthy CGPA and siblings who currently are studying in NSU. This acts as an incentive for students to concentrate on their studies and do well in their courses to maintain a GPA of 2.75, to me that’s relatively easy. So after doing my research my impression is that even though there are certain areas of improvement, unless I am going abroad, which I am not, NSU is my best offer. I am glad to be in NSU and get this financial aid offer; it is way better than any other offers in any other private university in Bangladesh.