What must be TRUE of any organ described as vestigial?

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Quizplus · Accepted Answer

A vestigial organ is an organ that has lost some or all of its original function through evolution. Homologous features indicate that the organ has a common evolutionary origin with a similar functioning organ in an ancestor. Therefore, a vestigial organ must be homologous to some feature in an ancestor. Analogous features, on the other hand, indicate similar function but not necessarily a common evolutionary origin.

What Must Be TRUE of Any Organ Described as Vestigial