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       It is the reappearance of a certain ancestral, not parental organs which has either been completely disappeared or reduced.

Atavism        Atavism also gives evidence of organic evolution. The best example of atavism is the presence of a short tail in some human babies. Other than this, the presence of moving pinna, very large canines and very long and dense hair in some people are also some more examples of atavism. This shows that the humans have evolved from those organisms which possess a tail, moving pinna, large canines and lone and dense hair on their body.

Test Your Understanding and Answer These Questions:

  1. What is atavism?

  2. Give one example of atavism.

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