AP BIOLOGY

Detailed explanation-1: -Charles Darwin listed a number of putative human vestigial features, which he termed rudimentary, in The Descent of Man (1871). These included the muscles of the ear; wisdom teeth; the appendix; the tail bone; body hair; and the semilunar fold in the corner of the eye.

Detailed explanation-2: -They were required to assist in chewing hard items such as roots and nuts. These are no longer required hence they have become vestigial.

Detailed explanation-3: -Here are five of the most notable vestigial organs in humans: appendix, tailbone (coccyx), erector pili and excessive body hair, wisdom teeth etc.

Detailed explanation-4: -Many people who develop them find that they do not have enough space in their oral cavity to accommodate a third set of molars. In modern times, wisdom teeth have become largely regarded as being vestigial structures (unnecessary parts of the human body, like the appendix).

Detailed explanation-5: -Although the tailbone is considered vestigial (or no longer necessary) in the human body, it does have some function in the pelvis.