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According to the evolutionary theory, formation of a new species is generally due to: 

A. sudden creation by nature 

B. accumulation of variations over several generations 

C. clones formed during asexual reproduction 

D. movement of individuals from one habitat to another

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Accumulation of variations during DNA copying mechanism over several generations leads to formation of new species. Sudden creation by nature, asexual reproduction or movement of individuals, do not affect the evolutionary process much.

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