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Question

Darwin could not properly explain the theory of evolution because of lack of :

A
Evidences
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B
Speciation
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C
Variations
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D
Genetics
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Solution

The correct option is D Genetics
One of the major drawbacks of Darwin's theory is the absence of knowledge on inheritance. The genetic basis of evolution, cause of variations was not included in Darwin's 'Origin of Species'. It was only after the discovery of genes and traits they govern by Mendel, genetics could be associated with evolution.
So, the correct answer is 'Genetics'

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