Interactive animation illustrates how Charles Darwin used his study of finch beaks to explain evolution. A phylogenetic tree diagram shows how the birds' color and beak shape changed over generations.

A field lab for biology that focuses students on the study of nature and its changes over time. Students are asked to observe and acquire knowledge of trees and the interdependence that a tree shares with other organisms.

These pages are part of a site called "Evolution," that accompanies a textbook by the same name. Mark Ridley is the author. Here he discusses theories for species change that were before Darwin published "On the Origin of Species."

Take an interactive quiz over evolution. After completing the quiz, check your score, and then revisit any incorrect question for further review.

A collection of classroom lessons to help high school biology teachers teach evolution and the nature of science. This highly lab-oriented module is a very useful evolution and deep-time teaching site.

[Free Registration/Login may be required to access all resource tools.] Ecosystems are "dynamic." This means that ecosystems change over time. Both natural forces and human actions cause ecosystems to change. Learn more about succession...

[Free Registration/Login may be required to access all resource tools.] Pursue several opportunities to explore the way animals have evolved over time and what has caused them to change.

In this biology field lab, students will observe a square foot area of an ecosystem surrounding our elementary school. The students will keep a journal to record the physical elements of the ecosystem which they will visit monthtly. The...