Analogy
From EvoWiki
Analogy refers to characters that are similar due to adaptation to the environment. That is, similarities that are the result of convergent evolution rather than coincidence or inheritance from a common ancestor. Therefore, analogy is a special type of homoplasy. For example, the wings of pterosaurs, bats and birds all perform the same function, due to the adaptation of flight, but differ in structure because of their evolutionary history, so are are termed analogous.
Analogy should be contrasted with homology, where characters are similar due to reasons other than adaptation to fulfil a function.
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