QuizFeb20 - E. A & B & C 2 Q3....

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1 Q1. Is it possible for populations to face different selection pressures (and have different average phenotypes) but still not speciate? A. No, because any difference in selection pressures will be enough to keep them from mating and will definitely cause speciation. B. No, because if populations face different selection pressures, they have independent evolutionary trajectories. C. Yes, because any gene flow will keep speciation from happening. D. Yes, because if there is enough gene flow, the populations will not be reproductively isolated enough for speciation to happen. Q2. What conditions are required for disruptive selection in a single population to cause speciation? A. Gene flow between individuals of the extreme phenotypes must be limited. B. Individuals must mate preferentially with others of their phenotype. C. The fitness of intermediate phenotypes must be less than that of the extremes. D. There must be a vicariance event causing geographical isolation between the types.
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Unformatted text preview: E. A & B & C 2 Q3. Which of the following is NOT true about phylogenetic trees? A. Similarities in DNA can be used to reconstruct trees. B. Phenotypic similarities can be used to reconstruct trees. C. If a trait evolves more than once, independently in different clades, we say the trait is homologous. D. If a trait evolves more than once, independently in different clades, we say the trait is convergent. E. Taxonomists try to make taxonomic classification reflect true evolutionary relationships by arranging organisms into monophyletic groups. C Q4. Which of the following trees is/are consistent with the data? Orangutan A T T C T T T C G A T T C G T T A C A C A C Human A A T C G T T C G A T C C G T T A T A C A C Chimp A A T C G T T C G A T C C G T T A T A C A C Gorilla A T T C G T T C G A T T C G T T A T A C A C H C G O H C G O H G O A. B. C. D. A & B & C E. B & C only...
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QuizFeb20 - E. A & B & C 2 Q3....

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