Articles Index

Aquatic Communities
Aquatic communities can be subdivided based on common characteristics. Two common designations are freshwater and marine communities.

Defense Mechanisms
Defense mechanisms are very important to all animal life. They can give prey an advantage against hungry predators.

Endangered Species
Endangered species are animals and plants that are on the verge of vanishing from the earth.

The Pyramid Of Life
The pyramid of life refers to the hierarchical structure for the organization of life.