Describes roundworm characteristics, including their classification, habitat, reproduction, infection of humans and pets, and how they are transmitted to other hosts. Includes some examples and the diseases they cause.

Describes the characteristics of cocci bacteria, their shape, how they arrange themselves in pairs and groups, common forms of cocci, their method of reproduction, and types of cocci that cause diseases in humans. Includes examples of...

Somatic cells are any cells that are not involved in reproduction and thus cannot be passed on to offspring. This resource discusses mutations in somatic cells, how they occur, how they are detected, and the diseases they can cause in...

An activity where students use peppers to explore reproductive potential and natural selection in part 1. In part 2, students look at traits such as dimples, tongue rolling, thumbs, ear lobes, and widow's peak to investigate individual...

See what you can learn about Chimpanzees with this World Wildlife Fund information page.

A biology course for high school students.

Did you know that beavers are vegetarians that do not hibernate and are rarely dangerous to people? You will find more beaver facts in this informative question and answer site.