In biology

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The modern evolutionary synthesis ascribes the observed diversity of life to [URL=“http://en.wikipedia.org/wiki/Selection”]natural selection, in which some random genetic [URL=“http://en.wikipedia.org/wiki/Mutation”]mutations are retained in the [URL=“http://en.wikipedia.org/wiki/Gene_pool”]gene pool due to the non-random improved chance for survival and reproduction that those mutated genes confer on individuals who possess them.

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