Chapter 18, Problem 9STP

Summary Introduction

Introduction:

The species isolation can be defined as the process by which two species are separated. This can be due to change in behavior of a group of individual of a population, change in reproduction pattern or geographic separation.

Answer to Problem 9STP

Option (B).

Explanation of Solution

Explanation for correct answer:

Option (B) geographic isolation. In this case, a group of mouse must have been separated from the group of organism on the main land, which causes the geographic isolation between the groups.

Explanation for incorrect answer:

Option (A) behavioral isolation. The behavioral isolation is caused due to change in behavior of the species, such as eating habits. Hence, this is an incorrect answer.

Option (C) reproductive isolation. This type of speciation occurs when two species living in the same area are unable to reproduce with one another. Hence, this is an incorrect answer.

Option (D) temporal isolation. It is a type of prezygotic barrier that is caused when two group of individuals starts being fertile at different time and cannot mate, here, no such thing is occurring. So, this is an incorrect answer.