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RU BL 262 - Examination

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BIOLOGY 262, FALL 2010 – SECTION 1 EXAMINATION #3 (PART 1) Name Date MULTIPLE CHOICE.⎯For the following multiple choice questions circle the letter in front of the response that best answers the question or completes the sentence. (20%, 2% each) 1. Which of the following IS an assumption of scientific philosophy? a. Different events must be caused uniquely. b. Hypotheses can be proven True. c. Sense experience represents reality with some reasonable consistency. d. The universe is chaotic (unordered). e. None of the above. (None are assumptions of scientific philosophy) 2. Which of the following is a correct species name for the staph infection bacterium? a. aureus b. aureus c. staphylococccus aureus d. staphylococcus aureus e. Staphylococcus aureus f. Staphylococcus aureus 3. Which of the following is the taxonomic rank between Kingdom & Class? a. Genus b. Kingdom c. Order d. Phylum e. Species 4. Which of the following is when a bacterium takes in DNA (as a plasmid) directly from another bacterium? a. binary fission b. conjugation c. transcription d. transformation e. None of the above 5. Which of the following ponds should have the greatest species richness? a. Large, far from lake, high nutrients b. Large, far from lake, moderate nutrients c. Large, far from lake, low nutrients d. Large, near lake, high nutrients e. Large, near lake, moderate nutrients f. Large, near lake, low nutrients g. Small, far from lake, high nutrients h. Small, far from lake, moderate nutrients i. Small, far from lake, low nutrients j. Small, near lake, high nutrients k. Small, near lake, moderate nutrients l. Small, near lake, low nutrients 6. A population of 400 fish is undergoing logistic pop. growth with an intrinsic rate of increase of 0.20 and a carrying capacity of 2000. What is the pop. size after 1 year? a. 16 f. 404 b. 32 g. 464 c. 64 h. 480 d. 80 i. 800 e. 400 j. None of the above. 7. For a population of 200 mice AT Hardy-Weinberg equilibrium with 72 individuals with the AA genotype, how many individuals are Aa? a. 6 f. 123 b. 8 g. 144 c. 36 h. 192 d. 67 i. 200 e. 96 j. None of the above. 8. Given the following genotypes in a population: 9 AA, 420 Aa, 490 aa. Is this population evolving with respect to the “A” gene? a. No b. Yes c. Cannot determine with the info. given. 9. Which of the following is TRUE about bryophyte gametophytes? a. They are the dominant generation. b. They make gametes by meiosis. c. They make spores by mitosis. d. They do not undergo photosynthesis. e. None of the above (All are false.) 10. Determine the status of the hypothesis that plant species richness will be greater in shade using these data: Mean species richness in shade = 22.4 Mean species richness in sun = 24.9 P-value = 0.09 a. Hypothesis Supported b. Hypothesis Rejected c. Cannot determine with the info. given.FILL-IN-THE-BLANK/SHORT PROBLEM.⎯For the following exercises write the appropriate word or words in the available space, sketch, or label as appropriate. 1. In the space below sketch and label a “typical” FUNGAL cell. Be certain to label all the important structures AND indicate what biomolecules compose each structure. (10%) DEFINITIONS.⎯For the following BIOLOGICAL words or phrases define them as accurately and concisely as possible. (20%, 4% each) 1. Bacterial Strain: 2. Ecological Succession: 3. Endosperm: 4. Natural Selection: 5. Science:BIOLOGY 262, FALL 2010 - EXAMINATION #3 (PART 2) Name Date FREE RESPONSE QUESTIONS/PROBLEMS.⎯For the following, address each in as concise and lucid a manner as possible. Do NOT exceed the space provided. (50%) 1. a.) Write down the summative chemical equation for photosynthesis. b.) Briefly (in 1 phrase or sentence) why does an organism undergo photosynthesis? c.) Where in a cell does photosynthesis occur. d.) Write down the summative chemical equation for glycolysis + cellular respiration. e.) Briefly (in 1 phrase or sentence) why does an organism undergo glycolysis + cellular respiration? f.) Where in a cell does glycolysis + cellular respiration occur. 2. Describe/explain the life cycle of a member of Phylum Coniferophyta. Include all life cycle stages, relevant unique structures, and label their ploidy. Also indicate all cellular processes that occur. Indicate the life cycle generation that is considered to be dominant. (20%) (Feel free but do not feel obliged to use labeled illustrations for your answer.)3. Briefly (in 1 sentence) explain how genetic drift and natural selection differ. (4%) 4. Based on the videos observed in class and your reading of The Evolution Explosion, explain why and how resistance to antibiotics arises and becomes common in bacteria. (4%) Based on the video observed in class and your reading of The Evolution Explosion, briefly explain why scientists expect that a reduction of the amount of antibiotics in the environment (via less use in animal feed and ending unnecessary prescriptions) would cause a decrease in the number of already resistant bacteria in the population. (4%) 5. Generally explain the carbon cycle and how it is related to global climate change. (Feel free but do not feel obliged to use a labeled diagram + a short phrase for your answer.)


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