[Free Registration/Login may be required to access all resource tools.] An overview of the major trends in animal evolution.

[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.

Shape of Life is a series of videos which explore the evolution of the animal kingdom. Discover those who study animals and the methods in which these scientists use to learn more about them.

This entry identifies the defining characteritics of animal evolution, including adaptation, speciation, extinction, animal parternships and natural selection.

This collection of images of six different creatures, including insects and carnivorous vertebrates, illustrates the wide range of mouth types that exist within the animal kingdom. It also discusses the environment and its impact on the...

The homeobox genes that define the basic body plan of mice and fruit flies are illustrated in this graphic from The Human Evolution Coloring Book by Adrienne Zihlman. The accompanying article describes how these genes act as "molecular...

In this informative site, homologous is defined and the wings of birds and bats are compared to clarify the concept.

Compare the freshwater stickleback with its saltwater relative and trace the evolutionary changes of the fish. Includes a lecture by Dr. David Kingley, as well as an animation showing the evolution of the stickleback in an Alaskan lake.

Evolution through natural selection governs the "design" of flying creatures. Engineers design flying machines. But flying is about physics, and physics is the ultimate arbiter of both processes, and that produces parallels in mechanical...

An advanced lesson that describes the role of mutations in the birth and death of genes. It includes background information, examples, video clips, and animations.

[Free Registration/Login may be required to access all resource tools.] Discusses the evolution of animal behavior and the nature-nurture debate.

In this biology inquiry lab, students study evolutionary relationships by making observations of preserved animal specimens, developing a question, then investigating by dissecting the specimens provided. This comparative approach offers...

Genitals are the fastest-evolving organs in the animal kingdom. Menno Schilthuizen explains how the evolutionary biology of nature's nether regions uncovers a hidden world of seduction, conflict, and rivalry.

Multiple choice practice questions over evolution and population dynamics and the human impact on animal populations. Passage 2.

This site from BioWeb Evolution was originally created as a ThinkQuest entry, and it has some good basic information about evolution. This page is on fossils and geologic time.

This extensive look at the arthropod provides enough information for any budding naturalist, but will also be interesting to one casually interested in insects, spiders, and crustaceans. The pictures are outstanding, and the writing is...

Learn about the endosymbiotic theory. This theory explains the evolution of cells from a mitochondria and chloroplast working together in a symbiotic relationship to the current cell structure.

Comprehensive reference material on ray-finned fishes, with information on their habitat, evolution, physical features, eating habits, reproduction, behavior, how they communicate, role in the ecosystem, and threats to their continuing...

Explore images and facts about the Aye Aye, including details on its evolution, appearance, habitat, breeding, diet, behaviour, and much more.

Explore images and facts about the Adelie Penguin, including details on its evolution, appearance, habitat, breeding, diet, behaviour, and much more.

Explore images and facts about the African Bush Elephant, including details on its evolution, appearance, habitat, breeding, diet, behaviour, and much more.

Explore images and facts about the African Civet, including details on its evolution, appearance, habitat, breeding, diet, behaviour, and much more.

Explore images and facts about the African Forest Elephant, including details on its evolution, appearance, habitat, breeding, diet, behaviour, and much more.

Learn facts about African Palm Civets, including details on their appearance, evolution, habitat, breeding, diet, conservation status, and predatory lifestyle.