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Q.

Choose correct option regarding the concept of Darwin and Hugo de Vries.

 DarwinHugo de Vries
1.Evolution is by saltationEvolution is gradual
2.Directionless variationsDirectional mutations
3.Variations are subjected to natural selectionMutations are not  subjected to natural selection
4.Small, directional variations cause evolutionRandom large heritable mutations cause evolution

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a

2

b

1

c

3

d

4

answer is D.

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Detailed Solution

Variations are small and directional according to Darwin.

Mutations are random, large and heritable according to Hugo de Vries.

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Choose correct option regarding the concept of Darwin and Hugo de Vries. DarwinHugo de Vries1.Evolution is by saltationEvolution is gradual2.Directionless variationsDirectional mutations3.Variations are subjected to natural selectionMutations are not  subjected to natural selection4.Small, directional variations cause evolutionRandom large heritable mutations cause evolution