Failed to connect to MySQL: Access denied for user 'examnext_online'@'localhost' (using password: YES) Chief agent of variation - Sarthaks eConnect
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Practice Online Test Series for JEE Main 2018 & NEET 2018

Chief agent of variation:

Chief agent of variation:

A.

Natural selection

B.

Mutation

C.

Acquired character

D.

Sexual reproduction
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