Explain vestigial organ and name vestigial organ of human
Answers
Vestigial organ - The structure that have lost some or all the functions that they used to perform earlier in their ancestor.
Vestigial organ of human :-
- Plica semiluneris
- Muscles of ear pinnae
- Body hairs
- Vermifrom appendix
- 3rd molar teeth or wisdom teeth
(1) Vestigial organs are degenerated or underdeveloped organs of organisms which do not perform any function.
(2) According to the principle of natural selection, such organs are on the verge of disappearance. But it takes many millions of years for its complete vanishing.
(3) The vestigial organs in one animal may be of use but to other kind of the animal as they still perform regular functions
(4) Appendix is vestigial for humans, it does not perform any function but in ruminant animals it is concerned with digestion.
(5) Ear muscles are vestigial for us but in monkeys and cattle they are functional.