The side toes of a horse, the pelvis of the whale, and the human appendix are all examples of structures that resemble structures of presumed ancestors, which are known as
A)analogous structures.
B)homologous structures.
C)vestigial structures.
D)homeotic mutations.

Question

Quizplus · Accepted Answer

These structures are considered vestigial because they are remnants of features that served important functions in the organism's ancestors but are now reduced or unused.

The Side Toes of a Horse, the Pelvis of the Whale