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Exam 1 ZUFALL - PRINTABLE VERSION Test 1 You scored 90 out...

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PRINTABLE VERSION Test 1 You scored 90 out of 100 Question 1 Your answer is CORRECT. According to Darwin, which of the following is a requirement for the process of evolution by natural selection? a) Homologous traits b) Neutral mutations c) Uniformitarianism d) Nonrandom survival or reproduction e) Populations that differ in size Question 2 Your answer is CORRECT. Biological evolution is best defined as: a) Selection on individuals for the good of the species. b) A progression from lower to higher organisms driven by natural selection. c) Random processes leading to adaptation. d) Change in the heritable traits of populations over multiple generations. e) Individual variation resulting from natural selection. Question 3 Your answer is CORRECT. The graphs below show the change in allele frequency over 500 generations of natural selection. The two graphs represent two populations experiencing two different selective scenarios. Which statement best describes the difference between the two populations?
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a) The selective coefficient is smaller in the population on the left than in the population on the right. b) The graph on the left shows an unstable equilibrium; the graph on the right shows a stable equilibrium. c) The graph on the left shows genetic drift; the graph on the right shows natural selection. d) Selection is favoring a beneficial recessive allele in the population on the left and a beneficial dominant allele in the population on the right. e) The graph on the left shows heterozygote advantage; the graph on the right shows a beneficial dominant allele. Question 4 Your answer is CORRECT. Based on the phylogeny of vertebrates shown below: a) Amphibians have amniotic eggs. b) Bony skeleton is a synapomorphy of sharks and ray-finned fish. c) Primates and rodents and rabbits form a monophyletic group. d) Four limbs is a homoplasious trait of amphibians and crocodiles. e) Amphibians are more closely related to ray-finned fish than they are to crocodiles. Question 5
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Your answer is CORRECT. The following figure shows a phenotypic space with two traits (X and Y) according to Fisher's geometric model. The arrows represent mutations with different magnitudes and directions. Which of the following statements is correct? a) All of the mutations are deleterious. b) The smallest mutations are beneficial.
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