Midterm1-ans-corrected - ECOL MCB 182 T/Th 2:00-3:15...

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ECOL / MCB 182 T/Th 2:00-3:15 SECTION FIRST MIDTERM FEBRUARY 21, 2008 NAME: ____________________________ __________________________ Last First UA NetID ______________ Questions 1-40 are required. Questions 41-44 are optional and extra credit. Each question is worth 2.5 points. Choose the single correct answer to each question. 1. A trait that differs from its ancestral form is called a. an altered trait. b. a homoplastic trait. c. a derived trait. d. a parallel trait. e. a homologous trait. 2. Evolutionary biologists use ____________ in constructing phylogenies because, absent addi- tional information, it is best to provisionally adopt the simplest hypothesis capable of explain- ing the known facts. a. descent with modification. b. Haeckel’s Ontogenetic Law c. the principle of least action d. the principle of parsimony e. None of the above. 3. Homologous traits are a. similar in function, but not always in structure b. similar in structure, but not always in function c. derived from different ancestral structures, despite having similar functions d. both a and c e. none of the above 4. Two processes that make defining ancestral character states difficult are a. evolutionary innovation and adaptive radiation. b. evolutionary reversal and convergent evolution. c. evolutionary constraints and dynamic equilibrium d. a. and b. e. None of the above
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______________ UA NetID ___________ 2 5. Which of the following biological phenomena can be viewed emergent phenomena? a. Construction of cells by worker bees in a hive. b. Epileptic seizures. c. Self-awareness, i.e. , consciousness. d. All of the above. e. None of the above. 6. In a series of lectures delivered in 1943, Erwin Schrödinger postulated the following sources of biological order: a. Consumption of energy to effect local reversal of the 2 nd Law of Thermodynamics. b. Existence of an aperiodic crystal encoding developmental information. c. Enzyme systems that preserve the integrity of the genetic code via DNA repair. d. a. and b. e. All of the above. 7. When biological processes depend on the existence of a potential function, energy is consumed. a. True. b. False. 8. Equilibrium necessitates stability. a. True. b. False. c. Can’t say absent additional information. 9. In diploid populations, selection can a. preserve genetic variability. b. reduce genetic variability. c. Both. 10. The Hardy-Weinberg equilibrium refers to the establishment of equilibrial genotypic frequen- cies in single generation under the following circumstances: a. No migration. b. No selection. c. Random mating. d. a. and b. e. a., b. and c. 11. For a single genetic locus, selection induces changes in gene frequency that _______ the aver- age population fitness. a.
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Midterm1-ans-corrected - ECOL MCB 182 T/Th 2:00-3:15...

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