Exam 3 Fall 2011_A.KEY
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Exam 3 Fall 2011_A.KEY

Course Number: BIOLOGY 101, Fall 2011

College/University: UNC

Word Count: 2096

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Fill out your scantron answer sheet: Write in and bubble in your name and PID number. You may write on this and YOU MAY KEEP IT! You will only be able to see your score later, so to know how you answered a specific question, keep track of your answers on these sheets too. NOTE: You will only be able to see your score at onyen.unc.edu. ***SEQUENCE NUMBER 777777 1. A proficient engineer can easily design skeletal...

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out Fill your scantron answer sheet: Write in and bubble in your name and PID number. You may write on this and YOU MAY KEEP IT! You will only be able to see your score later, so to know how you answered a specific question, keep track of your answers on these sheets too. NOTE: You will only be able to see your score at onyen.unc.edu. ***SEQUENCE NUMBER 777777 1. A proficient engineer can easily design skeletal structures that are more functional than those currently found in the forelimbs of such diverse mammals as horses, whales, and bats. The actual forelimbs of these mammals do not seem to be optimally arranged because 1) natural selection is generally limited to modifying structures that were present in previous generations and in previous species 2) in many cases, phenotype is not merely determined by genotype, but by the environment as well. 3) though we may not consider the fit between the current skeletal arrangements and their functions excellent, we should not doubt that natural selection ultimately produces the best design. 4) natural selection has not had sufficient time to create the optimal design in each case, but will do so given enough time. 2. The tissue lining the inside of the lungs must have a large surface area relative to volume for efficient exchange of gases. Additionally, the gases must be exchanged to and from the lung cells into the capillaries quickly without going through multiple cell layers. What type of tissue is this most likely to be based on this information? 1) stratified squamous epithelium 2) loose connective tissue 3) simple squamous epithelium 4) smooth muscle 5) fibrous connective tissue 3. Given a population that contains genetic variation, what is the correct sequence of the following events, under the influence of natural selection? 1. Well adapted individuals leave more offspring than do poorly adapted individuals. 2. A change occurs in the environment. 3. Genetic frequencies within the population change. 4. Poorly adapted individuals have decreased survivorship. 1) 4 2 3 1 2) 4 2 1 3 3) 4 1 2 3 4) 2 4 1 3 5) 2 4 3 1 4. In a Hardy-Weinberg population with two alleles, A and a, that are in equilibrium, the frequency of allele a is 0.2. What is the percentage of the population that is heterozygous for this allele? (no calculators allowed on the exam). 1) 0.2% 2) 4% 3) 2% 4) 32% 5) 16% 5. According to the Hardy-Weinberg theorem, the frequencies of alleles in a population will remain constant if _____ is the only process that affects the gene pool. 1) immigration 2) genetic drift 3) sexual reproduction 4) mutation 5) differential reproductive success 6. Most Swiss starlings produce four to five eggs in each clutch. Starlings producing fewer, or more, than this have reduced fitness. Which of the following terms best describes this situation? 1) artificial selection 2) stabilizing selection 3) directional selection 4) disruptive selection 5) sexual selection 7. In an area of erratic rainfall, a biologist found that grass plants with alleles for curled leaves reproduced better in dry years, and plants of the same species with alleles for flat leaves reproduced better in wet years. This situation would tend to __________. 1) cause genetic drift in the grass population 2) lead to uniformity in the grass population 3) cause gene flow in the grass population 4) preserve genetic variation in the grass population 5) lead to new mutations 8. In seedcracker finches from Cameroon, small- and large-billed birds specialize in cracking soft and hard seeds, respectively. If long-term climatic change resulted in all seeds becoming hard, what type of selection would then operate on the finch population? 1) directional selection 2) disruptive selection 3) stabilizing selection 4) No selection would operate 9. Two (X and same is classification reflects evolutionary phylogenetic tree? 1) A 2) B 3) C 4) D existing elephant species Y) are placed in the genus Loxodonta and a third existing species (Z) placed in the genus Elephas. Assuming this relatedness, which of the following is the most accurate 10. Arrange the following list of words (A-E) from most general (i.e., most inclusive) to most specific (i.e., least inclusive): A. natural selection B. microevolution C. intrasexual selection D. evolution E.sexual selection A) D, B, A, C, E B) D, A, B, C, E C) A, D, B, E, C D) D, B, A, E, C E) A, B, D, E, C Researcher Dianne Dodd divided a laboratory population of fruit flies and then raised some flies on a starch medium and others on a maltose medium. After one year (about 40 generations), populations raised on starch digested starch more efficiently, while populations raised on maltose digested maltose more efficiently. This indicated that had adapted to better use the nutrients present in environments. Dodd then put flies from the same or differently adapted population in mating cages and measured mating frequencies (experimental group). also performed control experiments. Use the results experiments to answer the next two questions. the 59 matings in the experimental groups, how many between like-adapted flies (flies adapted to the same medium)? 2) 17 3) 22 4) 59 5) 30 flies their She of her 11. Of were 1) 42 12. Which of the following statements is best supported by the data on matings in the experimental groups? 1) The starch-adapted flies and maltose-adapted flies are not different species, but a reproductive barrier is forming between the populations. 2) Increased gene flow between populations leads to more genetic variation. 3) There is no evidence of reproductive isolation between the starch-adapted flies and maltose-adapted flies. 4) The starch-adapted flies and maltose-adapted flies appear to now be separate species as defined by the biological species concept. 13. Which of the following is an example of temporal isolation of two species? 1) Two species of insects occur in the geographic region but one is tree-dwelling and the other is ground dwelling. 2) Two species of snails attempt mating but their reproductive parts don't fit together. 3) Two species of sea urchins release their sperm and egg into the water on the same night of the year. 4) A horse and a donkey produce a fertile offspring, the mule, which is sterile. 5) One species of bird is fertile and performs an elaborate courtship ritual in early November while another species is not fertile until December. 14. Which is a correct order of adaptations in vertebrate evolution? 1) cranium- jaws- lung like derivatives amniotic eggs hair 2) jaws cranium tetrapody hair lung- like derivatives 3) cranium lung like derivatives endothermy jaws tetrapody 4) tetrapody amniotic eggs mammary glands ectothermy 5) tetrapody jaws lung-like derivatives - enodthermy amniotic eggs 15. Which of these would determine whether an animal was a reptile or a mammal? 1) Whether sperm the were deposited in water to fertilize the eggs 2) Whether it had amniotic eggs or not 3) Whether it lived in the water or land. 4) Whether it was active at night or day. 5) Whether it maintained a constant body temperature. 16. A new animal has just been discovered in Australia. It has a white body and very large eyes. It lives in a the dry grasslands and has a three chambered heart. It has very large front claws. It lays eggs in sandy soil in October. Which of the following is a likely conclusion based on these descriptions? 1) The animal is probably covered in scales. 2) The animal is likely most active at night. 3) The animal is not likely to be active during the coldest months of the year. 4) The animal probably burrows underground. 5) all are reasonable conclusions 17. How many of the following will increase the carry capacity for a population? A. A species with the same food requirements is introduced to the environment. B. An abandoned building will provide more nesting sites. C. A parking lot is built shrinking the habitat D. A main competitor for food is eliminated from the habitat. E. Wetlands are drained, decreasing the amount of water available. 1) 0 2) 1 3) 2 4) 3 5) 4 18. Scientists estimated a deer population size using the capturerecapture method. On the first day out, they tagged 10 deer and set them free. A month later, they located 40 deer, of which 5 had tags. Based on these data, what would they estimate the population of deer to be in this area? (no calculator allowed) 1) 400 2) 80 3) 2,000 4) 4, 000 5) 5, 000 19. Which one of the following survivorship curves fits humans, in which the majority of offspring live into old age? 1) curve X 2) curve Y 3) curve Z 4) cannot determine from this graph 20. It is the year 2050, scientists have figured out how to make a synthetic stomach. Which is NOT a secretion that scientists would need to engineer as part of normal stomach function? 1) bicarbonate 2) pepsinogen 3) gastrin 4) mucous 5) HCl 21. Which of the following population curves represents a population currently living close to its carrying capacity in an unstable environment? 1) A 2) B 3) C 4) D 5) E 22. What macromolecule's digestion would be most affected by reduced bile production? 1) starch 2) fats 3) fiber 4) proteins 5) nucleic acids 23. 1) its wide variety poison is no To avoid being eaten by herbivores, plants in the Colorado Rockies synthesize poisons. How has the Pika co-evolved and adapted as described in the Plant Predators video? It urinates on the leaves to neutralize the poison. 2) It grinds them up with hind paws and lets the poison drip out. 3) A mutation allows Pika to be resistant to a of toxins. 4) It waits to eat it until the plant begins to dry out, a sign that the longer toxic.5) It submerses the plant in water, and the toxins diffuse out. 24. Thanks to a new conservation program, a population with only 100 individuals at the beginning of the year is growing exponentially. The population has a per capita birth rate of 0.4 and a death rate of 0.2. What will the population be at the end of the year? (no calculators) 1) 104 2) 106 3) 120 4) 110 5) 160 25. Which of these is an example of negative feedback? 1) As a blood clot begins to form, the process of its formation gets faster and faster. 2) The digestive enzyme pepsinogen is converted to pepsin by the action of hydrochloric acid. 3) Once labor begins, contractions increase in frequency and intensity. 4) After eating a high glucose snack, insulin stimulates the lowering of blood sugar levels 5) The smell of bacon increases gastrin levels which increase stomach acid production. 26. 1) 2) Homeostasis is the _____. cooperation of body parts to form tissues, organs, and systems correlation of structure and function 3) exchange of materials with the surrounding environment 4) idea that all vertebrates are built in a similar way 5) maintenance of a relatively constant and optimal internal environment Use the image to the right. From the choices below, blood located in "C" through the ________ next. ventricle 2) right AV valve 3) left ventricle 5) right semilunar valve 27. will pass 1) right 4) left semilunar valve 28. `The early bird gets the worm." What phrase would best describe the relationship between the bird species that is out early eating many worms and the bird species that slept in? 1) resource partitioning 2) indirect competition 3) direct competition 4) mutualism 5) parasitism 29. Thinking about blood flow through the cardiovascular system, which letter to the right represents blood flow velocity in the capillaries? 1) c 2) d 3) f 4) h 5) i 30. Max, Mary, and Magda are all patients at a gastroenterologist's office (doctor who works with digestive disorders). Max has been feeling a burning feeling in his lower chest and feels better when he doesn't eat large meals. Mary has trouble swallowing--and has been choking and coughing a lot. Magda has been having constipation. Match the patient with a problem from this list: A. Faulty sphincter between the small and large intestine B. Blockages in the ducts leading from the gall bladder to the duodenum. C. Sluggish peristalsis in the large intestine D. Gastroesophageal reflux disease (GERD) E. Inflammation of the pancreas F. Faulty epiglottis 1) Max - B; Mary D; Magda F 2) Max - A; Mary B; Magda C 3) Max - E; Mary A; Magda B 4) Max - D; Mary F; Magda C 5) Max - D; Mary E; Magda F 31. Which of the following conditions in mice would lead to obesity? 1) low leptin levels 2) high PYY levels 3) low ghrelin levels 32. 4) all of the choices The graph to the left follows an appetite hormone over a 24 hour period. This hormone is highest ______________ much like the hormone ___________. 1) at meal time; ghrelin 2) a little after eating a meal; PYY 3) a little after eating a meal; ghrelin 4) at meal time; PYY 33. Which vessel contains de-oxygenated blood? 1) pulmonary artery 2) aorta 3) pulmonary vein 4) arteries of the arms 5) arteries of the legs substrates in 1) lipase 34. When a biology student placed these five enzymes with vials at various levels of pH, only one functioned at low pH, which one? 2) amylase 3) chymotrypsin 4) nuclease 5) pepsin 3) during systole in the veins 35. The pressure in the cardiovascular system is highest: 1) during systole in the arteries 2) during diastole in the arteries 4) during diastole in the arterioles 5) during systole in the arterioles 36. An individual who consistently has a low resting heart rate and normal cardiac output is: 1) hypertensive (has high blood pressure) 2) likely to have a heart valve problem 3)likely to have a heart attack soon 4) probably an athlete 5) probably has a heart murmur Did you bubble in the SEQUENCE number on your scantron sheet? Your sequence number is 777777. Without this, it might be graded against the wrong key.

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UNC - BIOLOGY - 101
Fill out your scantron answer sheet: Write in and bubble in your name and PID number. You may write on this and YOU MAY KEEP IT! You will only be able to see your score later, so to know how you answered a specific question, keep track of your answers on
UNC - BIOLOGY - 101
Fill out your scantron answer sheet: Write in and bubble in your name and PID number. You may write on this and YOU MAY KEEP IT! You will only be able to see your score later, so to know how you answered a specific question, keep track of your answers on
University of Florida - EML - 4034c
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University of Florida - CHM - 2046
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University of Florida - CHM - 2046
University of Florida - CHM - 2046
University of Florida - CHM - 2046
University of Florida - CHM - 2046
University of Florida - CHM - 2046
University of Florida - CHM - 2046
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University of Florida - CHM - 2046
University of Florida - CHM - 2046
University of Florida - CHM - 2046
University of Florida - CHM - 2046
University of Florida - CHM - 2046
University of Florida - CHM - 2046
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University of Florida - CHM - 2046
University of Florida - CHM - 2046
University of Florida - CHM - 2046
University of Florida - CHM - 2046
University of Florida - CHM - 2046
University of Florida - CHM - 2046
University of Florida - CHM - 2046
University of Florida - CHM - 2046
University of Florida - CHM - 2046
University of Florida - CHM - 2046
University of Florida - CHM - 2046
University of Florida - CHM - 2046
University of Florida - CHM - 2046
University of Florida - CHM - 2046
University of Florida - CHM - 2046
University of Florida - CHM - 2046
University of Florida - CHM - 2046
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Section 2.11. f (3) = 5(3) + 6 = 15 + 6 = 21f (3) = 5(3) + 6 = 15 + 6 = 9f (a) = 5(a) + 6 = 5a + 6f (a) = 5(a) + 6 = 5a + 6f (a + 3) = 5(a + 3) + 6 = 5a + 15 + 6 = 5a + 213. g (0) = 3(0)2 6(0) 3 = 0 + 0 3 = 3g (1) = 3(1)2 6(1) 3 = 3 + 6 3 = 6g (a)
University of Florida - MAC - 2233
Section 3.11. f (x) = 0. (Rule 1)3. f (x) = 5x51 = 5x4 . (Rule 2)5. f (x) = 2.1x2.11 = 2.1x1.1 . (Rule 2)7. f (x) = (3)(x2 ) = (3)(2x21 ) = 6x1 = 6x. (Rules 2 and 3)9. f (r) = ( )(r2 ) = ( )(2r21 ) = 2r1 = 2r. (Rules 2 and 3)11. f (x) = (9)(x1/3 ) =
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Section 5.11. 43 45 = 43+5 = 42 = 16.33 36 = 33+6 = 33 = 27.3. 9(9)1/2 = 9 91/2 = 91(1/2) = 91/2 =5(5)1/2 = 5 51/2 = 51(1/2) = 51/2 =5.9 = 3.5.(3)4 (3)5= (3)4 (3)5 (3)8 = (3)4+58 = (3)1 = 3.(3)8(2)4 (2)6= (2)4 (2)6 (2)1 = (2)4+6+1 = (2)3 = 8.
University of Florida - MAC - 2233
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