What do you call body parts we evolve from having any use?

Question

you know the tail bone...whats the word called from which we evolve from having to use these.

Answer 1

Vestigial structures are anatomical structures of organisms in a species which are considered to have lost much or all of their original function through evolution. These structures are typically in a degenerate, atrophied, or rudimentary condition or form. Vestigial structures are often referred to as vestigial organs, though not all of them are actually organs.

Although the structures most commonly referred to as "vestigial" tend to be largely or entirely functionless, a vestigial structure need not necessarily be without use or function for the organism. Vestigial structures have lost their original main purpose, but they may retain lesser functionalities, or develop entirely new ones.[1] Thus, a "vestigial wing" need only be useless for flight to be vestigial; it may still serve some other purpose than that of a wing.

Answer 2

A tail bone is redundant!? Evolution doesn't always produce selective advantages, some anatomy, physiological or behavioral traits can be selectively neutral or even negative. A human tail bone would be a selectively neutral trait.

Answer 3

We produce a lot less body hair because it isn't mandatory. women people have more advantageous breasts - organic decision. Pose-able thumbs. Non-operating appendix. Smaller coccyx. we are taller and we stand upright. our bodies are being continually sophisticated and more desirable over the generations. desire that permits.

Answer 4

They're "vestigial" body parts, i.e. left-over vestiges of a past time when we needed them.

Answer 5

vestigial