Describes how desert plants adapt to their environment with its extreme temperatures, occasional downpour, almost constant drought, unrelenting sun, and shifting sands.

Describes the variety of trees and plants found in the forest as well as their interrelationships with other organisms in the environment.

Describes the grassland ecology of the great plains of the world with their various landscapes such as the savannah, the tundra, the steppe, and the great American plains.