Chapter 14 Study Guide The Origin of Species Describe the specific problems of classifying mosquitoes in London and North America. Concepts of Species • Define and distinguish between microevolution and macroevolution. • Compare the definitions, advantages, and disadvantages of the different species concepts. • Describe five types of prezygotic barriers and three types of postzygotic barriers that prevent population belonging to closely related species from interbreeding. Mechanisms of Speciation • Explain how geologic processes can fragment populations and lead to speciation. • Explain how reproductive barriers might evolve in isolated populations of animals. Refer to experiments on laboratory-raised fruit flies and to desert pool pupfish. • Explain how sympatric speciation can occur and how it typically happens in plants. • Explain why polyploidy is important to modern agriculture. • Explain how modern wheat evolved.
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