Which is the basis of evolution?

Natural selection in which more individuals acquire peripheral character values at both ends of the distribution curve is:

Which scientist introduced the initial concept of 'Survival of the Fittest'?

The peppered moth $(Biston \text{ } betularia)$, the black-coloured form became dominant over the light-coloured form of moth in England during the industrial revolution. This is an example of

Natural selection where more individuals acquire specific character value other than the mean character value,leads to:

$A$ very important consequence of geographical isolation is ........