Ucmp: Introduction to the Echinoidea

A brief introduction to the phylum arthropoda and some of their general characterisitics.

This site provides an introduction to bacteria and examines fossil records, life history and ecology, systematics, and morphology.

Very good introduction to the biology of these little creatures. Includes good pictures and nice background information.

Berkley offers an introduction to archaebacteria--ancient bacteria--including the history of the topic, scientific findings, and where to find archaeans. Includes images and links.

A good brief review of The Cenozoic Era, which also includes links to more detailed information as well as a chart of its subdivisions.

Nice informational site about the order Carnivora. The opening page lists members of the order and briefly describes relationships between humans and carnivores. It links to pages on evolution of carnivores, the ecological roles of...

A wonderful place to learn all about the fungi. click on the buttons at the bottom of the page to go to sections on their life history, systematics and morphology.

University of California Berkeley offers a good introduction to the world of polychaeta or marine worms.

Berkeley offers a great site on segmented worms titled, "Introduction to Annelida, Everybody's favorite, worms."

One of the most famous fossil organisms, trilobites were once a complex group. Learn to tell them apart in this illustrated article that tells how they lived, their body structure, there place in evolution, and the like.