Question

URGENT!!!!! HELP! LIMITED TIME!!!!!!!!!!!!

Scientists discover two populations of mice on either side of a major river.

The two populations have almost identical genes, but the mice from one side cannot breed with the mice from the other.
This is most likely because

Select one:

A. both species of mice lived on both sides but owls killed one
population on each side

B. the river separated one species of mice into two different species.

C. the similar habitat caused two species to become genetically
similar

D. two different species of mice migrated to the river from different directions

Answer 1

The answer to this question is: The most likely option for the mice to not breed is option (B) which is the river separated one species of mice into different species

The explanation of the above answer is as follows

The two populations having identical genes cannot breed because the river becomes the environmental barrier. There is no way for the mice to cross the river to the other side. Due to this reason, there is reproduction isolation for the mice. Therefore, the river separated one species of mice into two different ones and became the environmental barrier.