No reproductionBIOLOGY 262, FALL 2003 – KEY EXAMINATION #3 (PART 1) Name Key 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) 6. Which of the following is the Kingdom to which the kelps (brown algae) belong? 1. Which of the following is FALSE about science? a. Alveolata a. It is a philosophy. b. Euglenozoa b. It relies on sense experience. c. Fungi c. It requires an assumption of order in the universe. d. Stramenopila d. It requires empirical evidence. e. None of the above e. None of the above. (All are true.) 7. Which of the following is the Kingdom to which yeasts belong? 3. In an exponentially growing population with an intrinsic rate of increase of 0.5 per day and a population size of 1000 what is the population size after 3 days? a. Alveolata b. Euglenozoa c. Fungi a. 1125 d. Stramenopila b. 1500 e. None of the above c. 2250 8. Which of the following is TRUE about a member of Kingdom Fungi? d. 2500 e. 3375 a. It engulfs food, using pseudopodia. 3. A bacterium that obtains its energy from chemical compounds and its carbon from carbon dioxide is a…. b. It is photoautotrophic. c. It moves using flagella. d. It stores energy as glycogen. a. chemoautotroph. e. None of the above. (All are false) b. chemoheterotroph. 9. Which of the following best describes the association of a mycorhizza with a plant root? c. photoautotroph. d. photoheterotroph. e. None of the above a. Amensalistic 4. Which of the following is when a bacterium takes in DNA (as a plasmid) from another bacterium? b. Commensalistic c. Mutualistic d. Parasitic a. binary fission e. Saprobic b. conjugation 10. Which of the following is TRUE about hepatophyte gametophytes? c. transcription d. transformation a. They are dependent on the sporophytes for nutrition. e. None of the above 5. Which of the following is when a bacterium causes severe disease symptoms due to reproducing rapidly? b. They make gametes by meiosis. c. They make spores by meiosis. d. They produce the sporangia. a. high invasiveness e. None of the above (All are false.) b. high toxigenicity c. low invasiveness d. low toxigenicity e. low xylicityFILL-IN-THE-BLANK.For the following exercises write the appropriate word or words in the available space, sketch, or label as appropriate. (10%) 1. Label one derived characteristic for each of the indicated branches below. (3%) Hepatophyta Anthocerophyta Other Plants C B A a. cuticle, air pores, gametangia, etc. b. stomata (guard cells arnd. air pores) c. vasc. tissue (roots, stems, leaves), sp. dom. 2. What shape term best describes each bacterium below. (2%) bacillus helical (spirochete) 3. Label the indicated parts of the following coniferophyte structure. (3%) a b c a. integuments b. sporangium c. female gametophyte 4. What term correctly identifies the entire structure (including a., b., and c.) in 3 above.(2%) seed (mature ovule) DEFINITIONS.For the following BIOLOGICAL words or phrases define them as accurately and concisely as possible. (For indicated questions provide an example as well.) (20%, 4% each) 1. Endosymiotic theory of eukaryotic origins: A belief that natural phenomena have natural causes that can be revealed by empirical evidence. 2. Fairy ring: Ring of fungal reproductive bodies (mushrooms) that forms at the periphery of a mass of hyphae. 3. Fruit: Mature anthophyte ovary; The seeds (mature ovules) surrounded by carpel (ovary) tissue. 4. Natural selection (define AND provide an example that is not mentioned elsewhere in this test): Differential reproduction based on differences in inherited characteristics that interact with the environment. EXAMPLES: Drosophila bristle experiment; Drosophila wing experiment, etc. 5. Opportunistic pathogens (define AND provide an example that is not mentioned elsewhere in this test): Organisms that will only cause disease under certain conditions (or when introduced to certain areas of the body). EXAMPLES: E. coli causing urinary tract infections, etc.BIOLOGY 262, FALL 2003 - KEY EXAMINATION #3 (PART 2) Name Key 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. Briefly explain what occurs during anthophyte sexual reproduction from pollination through the formation of a seed. (Feel free but do not feel obliged to use labeled drawings for or to supplement your answer.) (10%) endosperm (3n) pollen (1n) mitosis double fertilization sperm (1n) 2. People infected with drug resistant strains of the HIV virus were taken off of anti-HIV drugs for a period of time. Later, the patients were given the same anti-HIV drugs. These drugs then greatly reduced a newly drug-susceptible HIV population. Why did the virus population become susceptible to anti-HIV drugs after patients stopped taking the drugs? Provide an evolutionary explanation. (10%) Many resistance mutations have a reproductive costs causing their bearers to reproduce more slowly than non-resistant bacteria. Therefore, when drugs are absent being non-resistant is favored by natural selection. no anti-viral drugs Anti-viral drugs “wild type” virus Fast reproduction No reproduction resistant virus Slow reproduction Slow reproduction 3. You are eating a biscuit with honey on it. A friend of yours tells you that “Bees eat tree sperm and vomit it up to make honey.” You tell your friend “Honey isn’t vomited pollen. It’s vomited nectar.” Your response about nectar forming honey is correct. (a.) What is something else that is wrong with your friend's statement? Briefly explain in 1 sentence. (b.) Briefly, in 1 sentence, explain why flowers produce nectar to feed bees and other animals? (8%) (a.) Pollen are small male gametophytes, not sperm. (b.) Flowers reward animals with nectar to get them to transport their pollen more efficiently than wind. embryo sac (1n) zygote (2n) sporophyte (2n) egg (1n) sperm (1n)4. A flu virus that causes about 48-72 hours of gastrointestinal symptoms and a high fever infects a student in the Regis University dormitories. Once a student has recovered from infection by the virus the student is immune to re-infection by the virus. The number of cases in the Regis dormitories changed as outlined in Table 1 during