EvolutionPracticeQuestions

EvolutionPracticeQuestions - Practice questions for the...

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Practice questions for the Evolution midterm 1) An adaptive radiation produces: a) sterile hybrids b) unfilled ecological niches c) a group of closely related but distinct lineages d) unoccupied habitats e) a reduction in the rate of evolutionary change 2) If a gene is described as polymorphic, how many alleles does it have? a) One b) Two c) Three d) Two or more 3) A female hummingbird normally lays exactly two eggs each time she nests. Occasionally, a nest with three eggs is found, but the usual result is the loss of all three nestlings because the nest, built for two, breaks apart as they grow larger. Of course females that lay only one egg, which also occurs from time to time, raise only one young. Assuming egg number is inherited, this pattern is an example of: a) directional selection b) disruptive selection c) stabilizing selection 4) Which of the following populations is in Hardy Weinberg equilibrium? I. 25% AA, 50% Aa, 25% aa II. 64% AA, 32% Aa, 4% aa III. 81% AA, 18% Aa, 1% aa a) I only b) II only c) III only d) I and II only e) I, II and III 5) Because of differences in breeding times, two species of frog do not mate at the same time and so do not produce interspecific hybrids. The isolating mechanism is: a) behavioral b) mechanical c) temporal d) hybrid breakdown 6) Evolution is often described as "the theme that ties together all aspects of biology." This is because the process of evolution A. explains how organisms become adapted to their environment. B. explains the diversity of organisms. C. explains why all organisms have characteristics in common. D. explains why distantly related organisms sometimes resemble one another. E. all of the above are appropriate answers.
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7) An example of coevolution is that between A. birds and bees B. flowering plants and insect pollinators C. dinosaurs and mammals D. humans and other primates 8) Which of the following is not a fact or inference of Darwin's theory of evolution by natural selection? A. there is heritable variation among individuals.
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EvolutionPracticeQuestions - Practice questions for the...

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