Exam 18: Adaptation and Speciation

A rainforest is a highly complex habitat, with organisms living at various levels in the trees, on the ground, and underground. Is it possible to consider two populations living in the same tree to be geographically isolated?

The population of salamanders, a _______ species found along the Pacific coast of the United States, forms a circle around a desert-like valley. Neighboring salamander species mate, but those on opposite sides of the valley do not.

Which of the following is not true of adaptations?

Examine the figure below. Why have the two plant populations depicted become so different in the time they were separated by the ocean?

A biological species is a group of interbreeding populations that is ________ isolated from other species of organisms living in the same region.

Sympatric speciation always follows allopatric speciation.