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class_islands - Extinction islands and diversity Quiz and...

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Extinction, islands and diversity
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Quiz and homework review Are bats and birds a good example of divergent evolution? Why? No. They are not closely related and they do not look alike because of a common ancestor. They look alike because of the environment where they live (Convergent evolution). Ecological opportunity is: When individuals take advantage of the lack of competition in a certain area and use the resources available. The final result may be adaptive radiation (b) Convergent evolution is…. When two non-related lineages have similar phenotypes because of the selective pressures of the environment where they live (c). The first primate appeared ___60 mya___, and Homo sapiens appeared ___300,000 ya__________ (c).
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Quiz and homework review What are “hybrid swarm” and “hybrid zone”? Please describe them. They both are possible outcomes of two species coming together. Hybrid swarm: Two species hybridize and produce fertile F1. These produce fertile F2 and there is backcrossing between F2 and F1. Hybrid zone: Geographic area where two species overlap and hybridize.
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  • Spring '08
  • Reichler
  • mass extinction, Extinction event, Contemporary extinction, Carboniferous Proterozoic eon Ordovician Devonian Extinction

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