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AP Biology Chapter 24.4. Process of making a species Biological Species Concept: Populations are no longer capable of interbreeding.

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Presentation on theme: "AP Biology Chapter 24.4. Process of making a species Biological Species Concept: Populations are no longer capable of interbreeding."— Presentation transcript:

1 AP Biology Chapter 24.4

2 Process of making a species Biological Species Concept: Populations are no longer capable of interbreeding

3 Is speciation a slow process? Fast process? Both?

4 Charles Darwin Gradualism: Slower process gradually developing species Support: Various fossil lineages Variation in large populations Allopatric speciation

5 Stephen J. Gould Punctuated Equilibrium: Rapid process & is followed by long periods of stasis Support: Various fossil lineages Sympatric speciation Adaptive Radiation

6 Convergent Evolution: Distantly related species converge on similar structures Bats, Birds, Butterflies wings are analogous structures

7 Parallel Evolution: Similar environments produce many similar species

8 Coevolution? Probably incorrectly applied to interspecific competition

9 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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