explain the evidences of evolution on the basis of comparitive morphology and an atomy?

Asked by VAIBHAV SRIVASTAVA | 3rd Jan, 2013, 09:50: AM

Expert Answer:

The study of homologous and analogous organs provides morphological and anatomical evidences of evolution. These evidences are based on the comparative forms and structures of various parts or organs of the body.

Homologous organs are organs of animals or plants which have a common structural design, develop from similar embryonic rudiments, and perform similar function. Example - Forelimbs of humans, bats, frogs, lizards, birds, cheetahs etc. have similar fundamental design. However, their limbs have been modified suitably to suit their purposes according to the environment. This shows that they had a common ancestor.

Analogous organs give evidence of evolution coming from two directions. Some biological characteristics are analogous, which means that they serve the same function in different species but they evolved independently rather than from the same embryological material or from the same structures in a common ancestor. An example of an analogous structure would be the wings of butterflies, bats, and birds.

Answered by  | 4th Jan, 2013, 12:27: PM

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