Which of Darwin's postulates about evolution by natural selection is most directly related to heritable variation?

1 Answer
Harsh
Nov 30, 2015

One of the darwin postulates states that :-
Organism with useful variations are selected by the nature and they are allowed to reproduce.

But Darwin could not explain where from these variations arise and what makes an organism fittest.
( am not explaining whole darwin's theory as you did not ask for it )

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