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A running water environment offers numerous microhabitats for many types of animals. Similar to plants, animals in lotic..

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Learn about community patterns and the ecological factors influencing these patterns. Revisit some of the ecosystems you..

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The Dinosaurs

Dinosaurs represented a major turn in the evolutionary development of organisms on Earth. The first dinosaurs were presu..

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This tutorial recognizes the importance of food as a source of energy that will fuel many biological processes. A good d..

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Types and Causes of Brain Damage

This tutorial describes the different types and causes of brain damage. Find out how genetics, physical injury, lack of ..

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Sensory Systems

A sensory system is a part of the nervous system consisting of sensory receptors that receive stimuli from the internal ..