The only biogeographic region that today is completely isolated from the other regions by water is
A) the Madagascan region.
B) the Ethiopian region.
C) the Neotropical region.
D) the Australasian region.
E) the Nearctic region.

Question

Quizplus · Accepted Answer

The Australasian region, which includes Australia, New Guinea, and surrounding islands, is the only biogeographic region that is completely isolated from the other regions by water. The other regions have some connections or overlaps with neighboring regions.

The Only Biogeographic Region That Today Is Completely Isolated from the Other