Adaptations of an animal are their:

$A$: $A$ single large mutation called saltation can produce new species.
$R$: Mutations are directional.

What is the core essence of Darwinism?

As a result of the excessive use of herbicides and pesticides,which types of varieties were selected in a short period?

Which of the following is the most important factor for speciation?

$I.$ Use and disuse of organs
$II.$ Inheritance of acquired characters
$III.$ Branching descent
$IV.$ Natural selection
$V.$ Mutation
$VI.$ Reproductive isolation
The two key concepts of Darwinism from the given options are