Dictionary of Human Evolution and Biology

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1. evolution of two or more closely associated species in which each species exerts reciprocal pressures on the other(s).

2. interaction of molecules of interrelated function (e.g. an enzyme series in a biochemical pathway) such that evolution in one molecule impacts the potential for evolution in one or more of the others.

3. theory of cultural evolution that attempts to explain changes in social systems in a nonlinear way, by a process of mutual selection among components; thus, the development of domestication systems affected the development of agriculture, and vice versa.

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