The Biology Project was developed at the University of Arizona as an interactive online resource. It was designed for biology students at the college and high school level, but is useful for medical students, physicians, science writers, and all types of interested people. There are also lesson plans and activities for K-12 students and teachers
The National Human Genome Research Institute supports genetic and genomic research, investigation into the ethical, legal and social implications surrounding genetics research, and educational outreach activities. Includes good resources for K-12 educators - check out the talking glossary!
The World Wildlife Fund is the largest privately supported conservation organization in the world. You can search the site overall, browse the featured sites, or submit a question to be answered by email. There are useful links for kids and for teachers
Directory of major sub-disciplines and topics in biology such as zoology, anatomy, botany, microbiology, genetics, evolution, and cell biology