Great exaptations: Most traits emerge for no crucial reason

[unable to retrieve full-text content]By simulating changes in an organism?s metabolism, scientists have now shown that most traits may emerge as non-crucial "exaptations" rather than as selection-advantageous adaptations.

Source: http://feeds.sciencedaily.com/~r/sciencedaily/top_news/top_science/~3/ufzMONrxecs/130715134424.htm

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