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Evolution

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Question

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

A

New needs and changes in environmental conditions

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B

A sudden change in climatic conditions

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C

Accumulation of variations over several generations

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D

Inheritance of acquired characteristics

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Solution

The correct option is C
Accumulation of variations over several generations

Origin of new species from the existing one is called speciation. Gene flow between two isolated subpopulations is very less. Over generations, genetic drift will accumulate different variations in each of the two isolated sub-populations. Natural selection may also operate simultaneously in these isolated populations. In this way, both genetic drift and natural selection result in the formation of new species.

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