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Published byDylan Russell Modified over 9 years ago
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AP Biology Chapter 24.4
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Process of making a species Biological Species Concept: Populations are no longer capable of interbreeding
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Is speciation a slow process? Fast process? Both?
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Charles Darwin Gradualism: Slower process gradually developing species Support: Various fossil lineages Variation in large populations Allopatric speciation
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Stephen J. Gould Punctuated Equilibrium: Rapid process & is followed by long periods of stasis Support: Various fossil lineages Sympatric speciation Adaptive Radiation
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Convergent Evolution: Distantly related species converge on similar structures Bats, Birds, Butterflies wings are analogous structures
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Parallel Evolution: Similar environments produce many similar species
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Coevolution? Probably incorrectly applied to interspecific competition
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Evolution is not goal oriented! There is no primary body plan for any species Natural Selection must work with current body plan Ex: 6 wings on birds would be awesome Adaptations are often compromises Ex: Seal flippers instead of legs
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