What Defines a Desert -- Long Stretches of Forbidding, Barren, Scorching Sand and Rock? Explore some of the diverse ecosystems that make up our planet: deserts, swamps, seashores, and man-made communities. Junior Science: Ecology 2 . .
Learn why an ecosystem's plants and animals are dependent upon one another for their existence, how their varied adaptations enhance their chances for survival, how food energy flows from organism to organism, and how human actions affect natural environments.
Features: Junior Science - Ecology 2 . .
45 minute Multimedia Presentation.
500+ Color Images & Photographs.
100+ Interactive Questions with Explanations, & Automatic Quizzes.
