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 transcript:

AP Biology Chapter 24.4

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

Is speciation a slow process? Fast process? Both?

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

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

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

Parallel Evolution: Similar environments produce many similar species

Coevolution? Probably incorrectly applied to interspecific competition

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