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Which of the following is/are Incorrect ...

Which of the following is/are Incorrect statements about the observation/work of Darwin and Hugo de Vries?

A

Charles Robert Darwin clearly and convincingly set forth the concept of natural selection as the mechanism of evolution, de Vries gave mutation theory

B

Darwin emphasised the adaptive nature of variation, de Vries stressed on its randomness

C

According to Hugo de Vries variations are small and directional, but Darwinian variations are random and directionless

D

Evolution for Darwin was gradual while de Vries believed mutation caused speciation and hence called it saltation

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