21) Levels of homology exist in all living organisms and discuss in detail with different kinds of homology exist with suitable examples

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QUESTION-21) Levels of homology exist in all living organisms and discuss in detail with different kinds of homology exist with suitable examples


ANSWER: 

Homology looks at the similarities that exists in living organisms in order to determine common ancestry. The similarities can be in the genes, physical appearance or function of structures. Examples of this include the front limbs of birds, bats, humans and lizards since they have the same structure.

 characters in different organisms that are similar because they were inherited from a common ancestor that also had that character. An example of homologous characters is the four limbs of tetrapods. Birds, bats, mice, and crocodiles all have four limbs. Sharks and bony fish do not.

An example of homologous structures are the limbs of humans, cats, whales, and bats. Regardless of whether it is an arm, leg, flipper or wing, these structures are built upon the same bone structure. Homologies are the result of divergent evolution.


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