What do u mean by vestigial organs??
Answers
Answer:
Vestigial organs are organs, tissues or cells in a body which are no more functional the way they were in their ancestral form of the trait. It is authentication of evolution and hence, were helpful in explaining adaptation.
Such a structure can arise due to gene mutation which causes a change in the proteins. These mutated proteins result in the formation of vestigial structures.
Some of the examples of vestigial organs are:
»Sinuses
»Appendix
»Coccyx
»Wisdom tooth
»External ear
»Nictiating membrane
»Tonsils
Other Vestigial Organs
Few other vestigial organs are mentioned below:
The snakes are believed to have descended from the lizards. Their legs grew smaller and smaller until a small bump was left at the back of some of the largest snakes like pythons.
Blind fish and salamanders still possess eye structures but live in caves. It is believed that mutations in genes that increase the taste buds degraded their eyes.
Cockroaches have wings. The wings that are present on the females do not facilitate flying.
The Galapagos cormorants have wings which are non-functional. These birds are believed to have turned into flightless birds abut 2 million years ago.
The whale shark is a filter feeder. It consists of rows of teeth that cannot bite anything
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