BSCI 105 Midterm: Study Guide Key Ch_22_Darwin _ Evolution
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1: match the theory or philosophy and its proponent(s) with the following descriptions, catastrophism, inheritance of acquired characteristics, gradualism, natural selection, taxonomy, scale of nature, uniformitarianism, aristotle, cuvier, darwin, hutton, lamarck, linnaeus, lyell. Answers a: e f, a b, b e, c c, d, g, f a, d c, g g, 5,1,2,4,3,7,6. Summarize in your own words darwin"s theory of natural selection as the mechanism of evolution. Answer: the excessive production of offspring sets up the struggle for existence; only a small proportion can live to leave offspring of their own. Natural selection is the differential reproductive success of individuals within a population that are best suited to the environment, which leads over generations to greater adaptation of populations of organisms to their environment. Within a few weeks of treatment with the drug 3tc, a patient"s hiv population consists entirely of 3tc-resistan hiv. Explain how this rapid evolution of drug resistance is an example of natural selection.