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Natural selection is the mechanism put forward by Darwin as one of the two essential mechanisms for evolution, the other being random mutation (which Darwin described as inheritable variation, not knowing about genes at the time).

The modern evolutionary synthesis includes genetic mutations as the mechanism which provides variations upon which natural selection can act.

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Are genes responsible for evolution?

Evolution is the result of a process called survival of the fittest. Genes are part of the mechanism by which this happens.


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What is it called when evolution that occurs as a result of chance events like catastrophe?

genetic drift


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