As you study two closely related predatory insect species, the two-spot and the three-spot avenger beetles, you notice that each species seeks prey at dawn in areas without the other species. However, where their ranges overlap, the two-spot avenger beetle hunts at night and the three-spot hunts in the morning. When you bring them into the laboratory and isolate the two different species, you discover that the offspring of both species are found to be nocturnal. You have discovered an example of ________.
A) mutualism
B) character displacement
C) Batesian mimicry
D) resource partitioning

Question

Quizplus · Accepted Answer

This is an example of resource partitioning, as the two closely related species have adjusted their hunting times to avoid competition in areas where they overlap. This has resulted in each species having a different period of activity, which has led to them using different resources and minimizing competition. The fact that the offspring of both species are nocturnal suggests that this is a heritable trait that has evolved to reduce competition between the two species.

As You Study Two Closely Related Predatory Insect Species, the Two-Spot