define vestigial organs. write names if sine vestigial organ in human body and write the banes kg those animal in whombsane organ are functional.
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Answer:
hello friend.
Vestigial organs are organs of the body which are smaller and simpler than those in related species. They have lost, or almost lost their original feature. ... But one type of snake – the boas – have vestigial rear legs and pelvis. The human vermiform appendix is another example.
Vestigial organs are those organs which have no particular function and remain in the body in an undeveloped form.They might have been useful to our ancestors. Some vestigial organs in human body are pinnae(auricular muscles of ear),Vermiform appendix,clitoris in female and nipples in male.
In the context of human evolution, human vestigiality involves those traits (such as organs or behaviors) occurring in humans that have lost all or most of their original function through evolution. Although structures called vestigial often appear functionless, a vestigial structure may retain lesser functions or develop minor new ones. In some cases, structures once identified as vestigial simply had an unrecognized function.
The examples of human vestigiality are numerous, including the anatomical (such as the human tailbone, wisdom teeth, and inside corner of the eye), the behavioral (goose bumps and palmar grasp reflex), and molecular (pseudogenes). Many human characteristics are also vestigial in other primates and related animals.
So here are ten vestigial traits and behaviors that you may still be clinging to.
10) The Appendix. The appendix is probably the most widely known vestigial human organ. ...
9) Sinuses. ...
8) Wisdom Teeth. ...
7) Coccyx. ...
6) The Ear. ...
5) Arrector Pili. ...
4) Tonsils. ...
3) Male Nipples.
Answer:
Vestigial organs
Degenerated to underdeveloped useless organs of organisms are called as vestigial organs. In living organism, sudden development of new tissues OR organs for living in changing environment is not possible. Instead, existing organs undergo gradual changes. Mostly, a specific structure in the body is useful under certain suitation. However, same structure different situations mat become useless ir even harmful. such structure begins to degenerate under such situation as per the principle of natural selection
It takes thousands of years for a structure to disappear. such organs are seen in different phases of disapperence in different animals. such organs, though non-funcyionak in certain organisms, it may be functional in other organisms. it is not vestigial in other organisms.
Appendix, which is useless to human, is useful and fully functional organ in ruminants. similarly, muscles of ear pinna, which are useless to human, are useful in monkeys for movement of ear pinna. various vestigial organ like tail -bone (coccyx) ,wisdom teeth, and body hairs are present in body of human beings.