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Tempo and Mode of Evolution

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Much of the current debate among scientists today is over the tempo and mode of evolution. Describe and contrast gradualism with punctuated equilibrium.

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Gradualism states that evolutionary change takes place very slowly (i.e. "gradually") over a long period of time. This was the classic evolutionary model of the early evolutionists, including Darwin. However, this model could not explain the evidence in the fossil record too well. What evidence? The lack of transitionary or ...

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