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Lecture%2011%20answers

Lecture%2011%20answers - Answers to study questions Lecture...

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Answers to study questions Lecture 11, Historical perspective on evolution 1. Plato established a philosophy of essentialism, which a. emphasized the important role of variation in providing the raw material for evolution b. demonstrated that ideas derived from the study of geometry can explain speciation processes c. demonstrated that evolutionary processes are consistent with the concept of scala naturae d. proposed that the natural world contains a number of discrete and unchanging forms e. all of the above are true Answer: d 2. Studies by geologists in the 1700’s and 1800’s helped to establish that the earth was older than previously thought by showing a. that all sedimentary rock was produced by volcanic eruptions b. that the formation of new mountain ranges could create a barrier to gene flow c. that sedimentation was gradual, but had produced very thick layers of rock d. that erosion was gradual, but had produced very deep valleys e. both c and d are true Answer: e 3. Jean Baptiste de Lamarck made a contribution to developing a theory of evolution by 4. Evolution by natural selection can produce organisms of tremendous complexity because a. adaptations are formed from mutations which occur in response to selection pressures b. evolution represents a process in which life forms change very gradually towards a
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