Reproductive isolation between segments of a single population is termed as

$A$: During industrialization,dark-winged or melanised moths were more abundant.
$R$: They were able to camouflage themselves,hide in the background,and survived.

Select an incorrect statement with respect to $Biston$ $betularia$ $:-$

Species living in different geographical areas are known as:

The origin of species from pre-existing species is known as:

Evolution is . . . . . . .