What are vestigal organs?
Give names of some..
Also give the useful function on other organisms which is not appliciable in humans.
Answers
Answer:
Non-human animals
The wings of ostriches, emus, and other flightless birds are vestigial; they are remnants of their flying ancestors' wings. The eyes of certain cavefish and salamanders are vestigial, as they no longer allow the organism to see, and are remnants of their ancestors' functional eyes.
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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.
In the population, the occurrence of such structures may, however, increase if it is beneficial enough. For instance, snakes have evolved to slither as they no longer have legs excluding some snakes who still possess rear legs(the Boas). In humans, the appendix is a good example of a vestigial organ. This non-functioning organ eventually degenerates, shrinking in size disappearing ultimately.
Examining vestigiality should be governed by drawing similarities with their counterparts with respect to their homologous features. The exposure of this occurs through various processes of evolution, one of which is the loss of function of a feature that is not subjected to positive selection pressures in accordance with its surroundings.
Vestigial organs vary from being pointless to favourable based on the selection. Some structures due to less or no utility, degenerate over a period of time to avoid consequences of genetic drift or selective pressures.
Explanation:
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