Speciation is caused by

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

What is a significant consequence of geographical isolation?

Genetic drift operates in which of the following?

An organism that possesses traits to survive and promote reproductive success is considered to be:

Darwin judged the fitness of an individual by