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...

Although it is happening every hour of every day, all over the world, the story of egg meeting sperm is still a tale worth telling. Millions of candidates set off on a long and perilous journey with a single target at the end, and if the...

[Free Registration/Login may be required to access all resource tools.] Overview of pregnancy and childbirth.

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.