Question

Define vestigial organs. Write names of some vestigial organs in human body and write the names of those animals in whom same organs are functional.​

Answer 1

Answer:

1. Vestigial organs are degenerated or underdeveloped useless organs of organisms.
2. Some vestigial organs in humans that are functional in other animals are as follows:

• Appendix: It is fully functional in ruminants for digestion of cellulose.
• Muscles of the ear pinna: It is useful in monkeys and other animals like rabbits, cows, horses, etc. for movement of ear pinna.
• Other vestigial organs include the tail-bone, body hairs, nictitating membrane, wisdom tooth, etc.

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Answer 2

Answer:

Vestigial organs is a term used for organs which are degenerated, underdeveloped or useless for an organism. Usually, with the changes in the outer environment, the organs undergo a gradual change in order to cope up with those changes. Presence of vestigial organs is an indication that they were useful for our ancestors but as we evolved with the changing surroundings, these structures lost their functionality but our still found in our bodies. It is not compulsory that if an organ is vestigial for humans, so will it be for other organisms too.

Explanation: