The struggle for existence is:

The diagram below shows the process of natural selection. Choose the correct option for $P, Q$ and $R$.

Which characteristic is responsible for the formation of a new species?

What was the major contribution of the scientist August Weismann?

Prodigality of reproduction in Darwinism refers to:

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.
$\quad\quad P \quad\quad\quad Q\quad\quad\quad R$