These pages are part of a site called Evolution that accompany a textbook by the same name. Mark Ridley is the author. This section has an advanced discussion of determining allele and genotype frequencies using the Hardy-Weinberg ratio.

[Free Registration/Login may be required to access all resource tools.] This study guide looks at Darwin's theory of evolution and natural selection. It also looks at some of the evidence supporting the theory of evolution (comparative...

The Understanding Evolution website for teachers provides common examples of evolution, especially by artificial selection.

These pages are part of a site called Evolution that accompany a textbook by the same name. Mark Ridley is the author. There is a large amount of information available about adaptations and their role in evolution.

Evolution, natural selection, sexual selection, coevolution, convergent evolution, mimicry, and coloration, are the topics examined in this thorough site. Assess your comprehension of the material presented by delving into the learning...

Concise description of embryology as evidence for evolution, as used by Darwin.

The complete original text of On the Origin of Species by Charles Darwin.

These pages are part of a site called "Evolution," that accompany a textbook by the same name. Mark Ridley is the author. This section is about Darwin, his travels, and his observations that led to "On The Origins Of Species."

Charles Darwin was born in England on February 12, 1809. He was a "naturalist," best known for his theories of evolution. Darwin collected evidence that all life on Earth "evolved" from a common ancestry. He studied the process of...