Mutational theory of evolution was given by

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(D) The mutational theory of evolution, also known as the mutation theory, was proposed by the Dutch botanist Hugo de Vries in $1901$.He conducted exp

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Hugo de Vries

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(D) The mutational theory of evolution, also known as the mutation theory, was proposed by the Dutch botanist Hugo de Vries in $1901$.He conducted experiments on the evening primrose, $Oenothera lamarckiana$, and observed sudden, large, and heritable variations in the population, which he termed as 'mutations'.According to this theory, evolution is a discontinuous process caused by sudden mutations rather than small, gradual variations as proposed by Darwin.

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