Hugo de Vries gave the mutation theory to explain the mechanism of evolution. He conducted his experiments on ...... .

$A$ mutation is most likely to have a selective advantage in evolution if:

Genetic drift occurs in which of the following?

Which one of the following is a cause of sympatric speciation?

Given below are two statements regarding evolution.
$Statement-I$: Isolation is the separation of a population of a particular species into smaller units, which prevents interbreeding between them.
$Statement-II$: Due to isolating mechanisms, divergence and speciation do not occur.
In the light of the above statements, choose the most appropriate answer from the options given below.

What does artificial selection in high-milk-yielding cows indicate?