Cartoon characters take you on a tour of cells, DNA, RNA and biological techniques.

Enter the world of Science Bob to try home experiments, visit his on-line lab and get answers to your science questions.

The complete nature and wildlife resource featuring the Audubon Guides to plants and animals, outdoor planner and destination guide, habitat Guide, eCards, and newsletters.

Provides a visual journey through the stages of human development from conception to birth.

Fun and interactive site to help kids appreciate science. Why are snakes like lizards, and monkeys like moose? Find out here.

Describes microbiology, the rain forest and the possibility of extraterrestrial life. Also in French, German, and Spanish.

A site intended to teach users about biology and biotechnology. Includes some educational illustrations and animations that can be downloaded by teachers and other educators for use in their curriculum.

Provides interactive quizzes on topics such as cell biology, organ systems, ecology, and photosynthesis.

Offers a few facts such as how an insect breaths to why a chameleon can change it's color.

Offers news about plants, animals, and other life science issues. Also includes pop quizzes, and pictures. Site is available in Spanish.

Online activities, labs and tutorials. Site available in Spanish.

Links to information about each of the kingdoms and a glossary of terms.

Classification of organisms. Has diagrams showing where all organisms fit into the evolutionary tree.

Information on North American animals and plants with illustrations, text, activities, and access to a naturalist.

Facts, in-depth articles, ask-a-scientist forum, archive of answers and newsletter on oceans and ocean life.

Learn about wild animals through online fun and games.

Online activities for learning biology, including animated cartoons, an evolution simulation laboratory, and drag-and-drop quizzes.

A look at individual organisms, communities, populations, species, and ecological food webs.

Interactive GCSE Biology website. Some of the topics that it covers are cells, photosynthesis, the nervous system and homeostasis.

Introduces the natural history of the sea through a fun game.

Includes guidelines for incubating and candling eggs, photos, movies, egg cam, and resources. Sponsored by the University of Nebraska Cooperative Extension.

Educational web version of the Visitor's Center exhibit at the Smithsonian Tropical Research Institute in Panama. Includes information on rainforest mammals, frogs, birds and plants.

Well organized and illustrated general biology text from Estrella Mountain Community College, Phoenix, Arizona. Advanced, but very clearly explained and illustrated.

Provides concise information on all aspects of biology, from biochemistry and body systems to plants and history.

A Natural Science reference site for middle school students. Includes topic chapters, facts and figures, questions and quizzes. Quick search and index search available, as well as an Internet guide.

Contains information books, quick fact sheets, and the small wonders that are born at SeaWorld.

Features learning activities about plants, space geology, veterinary science, parasites, ecology, sea otters, pollen, and using a virtual telescope to view genetic material.

Cells, microbiology, the scientific method, invertebrates, plants, and vertebrates. There is also an extensive section with examples of different species. Offers downloads and online activities.

Learn about Louisiana wetlands, and the plants and animals that live there. Includes coloring pages, maps, and aerial photographs.

A nature reserve in Western Australia lets you look for a wallaby and colour a picture of native plants and animals.

Read about moose, wild turkeys, mosquitos, hummingbirds, and bears. Learn about habitat and wildlife biology. Color a bat, falcon, warbler, or eagle.

Pictures and descriptions of local plants, animals, and habitats, and how they relate to each other. Includes glossary, explanation of classifications, and links to reference sites.

Hidden picture of canopy critters, Ask Dr. Canopy, leaf and bark rubbings, poetry, and conservation tips.

A volunteer project that observes and records natural history events such as plants flowering, birds returning, frogs peeping, and weather events. Offers a field guide, graphs, maps, and reasons for the project.

Has tutorials and problem sets for learning biochemistry, cell, developmental, human, and molecular biology, Mendelian genetics, and immunology.

Provides an introduction to phylogeny, geologic time, and evolution.

Games, music, brainteasers, and other activities that introduce children to the impact of the environment on health.