Q.

Which of the following statements is true about Darwin’s theory?

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a

Speciation is caused due to single step large mutation.

b

Evolution is gradual and is caused by non-heritable variations.

c

Evolution is caused by sudden, random, directionless variations.

d

Evolution is caused by small, directional, heritable variations.

answer is D.

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Detailed Solution

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Evolution is gradual and caused by heritable variations, according to Darwin.

In mutation theory, Hugo deVries explained that:

  • Speciation is caused due to single step large mutation.
  • Evolution is caused by sudden, random, directionless variations.
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