If gene migration happens multiple times,it would lead to

Name the type of natural selection depicted in the given diagram (Type $I$,Type $II$ and Type $III$).

When members of a population attain sexual maturity at different times preventing inter-breeding,it is termed as . . . . . . isolation.

Identify $P, Q,$ and $R$ in the following descriptions of natural selection types:
$P -$ More individuals acquire peripheral character values at both ends of the distribution curve.
$Q -$ More individuals acquire mean character value.
$R -$ More individuals acquire value other than the mean character value.
$\quad\quad P \quad\quad\quad Q\quad\quad\quad R$

Darwinian fitness can be estimated by

If there were no evolution,then .....