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convergence

The development of a similar anatomical feature in distinct species lines after divergence from a common ancestor that did not have the initial trait that led to it. The common ancestor is usually more distant in time than is the case with parallelism. Convergence is thought to be due primarily to the independent species lines experiencing the same kinds of natural selection pressures. Convergence is also referred to as convergent evolution. Convergence results in homoplasies.

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