test2fa05 - Test 2 (Version 1) BIOL3306 Evolutionary...

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Unformatted text preview: Test 2 (Version 1) BIOL3306 Evolutionary Biology November 30, 2005 Instructions Scantrons: Mark your name and last four digits of your student ID on the scantrons. Mark the version of your test under special code K. Incor- rectly filled scantrons will incur a penalty of- 2 points. Time allowed: 80 minutes. Questions: The test consists of 32 multiple choice questions, each with only one correct answer. Scoring: Correct answer, +5 points; blank an- swer, 0 points; incorrect answer,- . 5 point. Some answers will earn partial credit (+2 point total), while others will result in a stiffer penalty (- 2 points total). Maximum score: 160 points. Questions 1. Figure 1 shows patterns of juvenile survival in hy- pothetical species of bird in relation to fledgling mass. The curves cover the normal range of body masses observed in each species. Which species experience directional selection? (A) A (B) A and B (C) C (D) B and D (E) All A B C D Body Mass Survival Figure 1 2. Which of the species represented in Figure 1 ex- perience stabilizing selection? (A) A, B and C (B) B and C (C) C (D) C and D (E) None 3. Consider two populations: one asexual, and one sexual. For simplicity, suppose that each female produces two offspring and that both populations have a stable sex ratio of 1:1. Which of the fol- lowing statements best defines the two-fold cost of sex in relation to the two populations? (A) The size of both populations will double ev- ery generation. The clone of offspring from an asexual female multiplies at twice the rate of the progeny descended from a sexual fe- male. (B) The size of both populations will remain con- stant every generation. The clone of offspring from an asexual female multiplies at twice the rate of the progeny descended from a sex- ual female. (C) The size of the sexual population will double every generation, whereas that of the asexual population will remain constant. The clone of offspring from an asexual female multiplies at half the rate of the progeny descended from a sexual female. (D) The size of the asexual population will dou- ble every generation, whereas that of the sex- ual population will remain constant. The clone of offspring from an asexual female mul- tiplies at the same rate as the progeny de- scended from a sexual female. (E) The size of the asexual population will dou- ble every generation, whereas that of the sex- ual population will remain constant. The clone of offspring from an asexual female mul- tiplies at twice the rate of the progeny de- scended from a sexual female. Ricardo Azevedo http://biol3306.blogspot.com/ 1 Test 2 (Version 1) BIOL3306 Evolutionary Biology November 30, 2005 4. The C-value is the amount of haploid DNA found in the cells of an organism. Which of the following statements best describes the C-value paradox?...
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test2fa05 - Test 2 (Version 1) BIOL3306 Evolutionary...

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