The resource allows learners to read the book online for free. A group of experts explain the fundamental methods of science, document the overwhelming evidence in support of biological evolution, and evaluate the alternative...

This comprehensive study guide covers the main terms and concepts needed for a unit on the evolution of multicellular life.

Scientific article discussing the evolutionary processes involved when an insect species splits into two other distinct species. (Published: February 28, 2011)

Biography of Louis Agassiz, a natural historian and a contemporary of Charles Darwin. He was most famous for developing his theory of an Ice Age. Agassiz argued vehemently against the theory of evolution, based on his interpretations of...

Explore the classification and evolution of mammals.

Divergent and convergent evolution are explained and their differences are highlighted.

The history of human evolution is described, from the first aquatic animals that developed the ability to walk on land and the pivotal organisms from then up to the present day. The author then goes on to make interesting predictions...

In this tutorial students can learn the definition of species, how new species evolve, and the processes that can cause new species to arise. At the end of the tutorial students can take a quiz to evaluate what they learned about...

This is a solid review of basic principles of population genetics with an emphasis on plants. Use this to complement your units on evolution and plant biology. Take the quiz to check your understanding.

This paper, the work of a Ph.D. researcher, presents an interesting discussion of the reasons that assexual reproduction is not used by most organisms. Toward the end is a specific discussion of reproduction in plants. Advantages and...

Take a closer look into the modern view of evolution. This article includes many pieces of evidence, all which support the theory of evolution.

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."

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.

This explanation of genetic drift is straightforward and easy to understand. Illustrations are provided to help visual learners

Information about amphibians, animals that can survive in a wide variety of habitats and cli-ates. The article discusses their behavior, diet, predators, conservation status, and evolution. (Published: August 29, 2008)

At the online companion Web site of "Evolution," the seven-episode series on PBS, piece together clues to how one of our early ancestors looked as you examine images from four significant fossil finds of Australopithecus afarensis.

A biography of Charles Darwin.

Explore the evidence for the theory of evolution.

A general overview over the evolution of one population or one species over a short period of time.

A reference page with key facts about reptiles. Includes key terms, structure and function, reproduction, biological classification, evolution, and ecology.

Discusses Lamarck's theory of evolution, which was developed before Charles Darwin's own theory, and how it fared over time. The core ideas in Lamarck's theory are described and his theory and Darwin's are compared. Lamarck's ideas...

This comprehensive study guide covers the main terms and concepts needed for a biology unit on birds.

This comprehensive study guide covers the main terms and concepts needed for a biology unit on animals.

This comprehensive study guide covers the main terms and concepts needed for a biology unit on the structure and classification of fish.