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Exaptation. The shift in the purpose of a trait during its evolutionary history. Recent findings on feathers rather well support feathers as exaptions. They originally evolved, so we think, as insulation and then later they became useful for flight.

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When a structure that has evolved in one context becomes co-opted for another purpose this event is called?

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When a structure that has evolved in one context becomes co opted for another purpose this event is called?

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