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Which of the following is not a conclusion of Darwin?

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Existing living forms share similarities with life forms that existed millions of years ago.

There had been extinctions of different life forms in the years gone by.

New forms of life arose at different periods of history of earth.

Gradual evolution of life forms occurred due to directionless variations.

answer is D.

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Detailed Solution

Variations that are small and directional caused gradual evolution according to Darwin.

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