Adaptation

The quality or state of being well-suited to a set of conditions; or, a phenotypic character that contributes to fitting an organism to a set of conditions; or, the process that results in organisms becoming better suited to a set of conditions.

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References

Amundson, R. (1996). “Historical development of the concept of adaptation.” In M.R. Rose & G.V. Lauder (Eds.), Adaptation (pp. 11–54). New York: Academic Press.