Why are Vestigial structures came about?

Answer 1

Through evolutionary changes, an organism might retain a lasting organ or anatomical feature that is no longer useful. The appendix is a vestigial organ in humans- it serves no purpose but may have been useful before a major change in the digestive system.

Answer 2

They seem to have lost much of their immune system function, though the argument over their vestigial status is not settled. Vestigial structures are structures that have lost their original function, but can be still useful. Creationists mistakenly think that vestigial means ' useless ', which it does not. The tonsils seemed to be organs of first line defense against ingested pathogens which now seem to be somewhat dangerous is some people to keep past a early developmental stage.

Answer 3

They are not. They actually form a ring around the back of the mouth to help to protect the body from food that may be infected.

(Sorry, people never ate grass only).