What must be true of any organ described as vestigial? (A) It must be analogous to some feature in an ancestor. (B) It must be homologous to some feature in an ancestor. (C) It must be both homologous and analogous to some feature in an ancestor. (D) It need be neither homologous nor analogous to some feature in an ancestor.

Vestigial organs are bodily tissues, organs, or cells that are no longer functional in the same way they were in the trait's ancestor. They helped to explain adaptation since they validated evolution.
Such a structure may develop as a result of a gene mutation that alters the proteins. Vestigial structures are created as a result of these mutant proteins.
Depending on the choice, vestigial organs might range from being useless to advantageous. Some structures degrade over time to avoid the effects of genetic drift or selective pressures because they are less or not useful.

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