A new river that cuts through the range of a species of terrestrial isopods, effectively ending gene flow between populations on either side, is serving as a(n)
A) biotic interchange.
B) Wallace line.
C) estivation.
D) biogeographic region.
E) vicariant event.

Question

Quizplus · Accepted Answer

The river cutting through the range of the species of terrestrial isopods is a physical barrier that separates and isolates the populations on either side. This kind of event is known as a vicariant event in biogeography, where a physical barrier causes a separation of a previously continuous population.

A New River That Cuts Through the Range of a Species