This site is a section part of a website that accompanies "Evolution," a textbook by Mark Ridley. Here he covers homologous structures, using them as evidence for evolution.

These pages are part of a site called "Evolution," that accompanies a textbook by the same name. Mark Ridley is the author, and in this section he discusses the evidence for evolution.

Explore the evidence for evolution: anatomy, molecular biology, biogeography, fossils, & direct observation.

The entire text of Charles Darwin's book, The Origin of Species is available on this site. This link is specifically for the chapter that discusses embryology as evidence for evolution.

Learn about several different forms of evolutionary evidence.

Learn about the evolution of life in the Paleozoic Era based on fossil evidence of the five classes of fishes. Read about the role these chordates played in the evolution of tetrapods.