[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.

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...

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.

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.

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 facts about the Japanese Macaque, including details on its appearance, evolution, habitat, breeding, diet, conservation status, and predatory lifestyle.

Find out what you know about the evolution of development by taking this post test.

Find out what you know about the evolution of development by taking this pre test.

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...

Two billion years ago, we share a common ancestor with this new-found relative. Is this our origin?

[Free Registration/Login Required] Learn about how animals adapt through evolution and how some plants and animals are becoming extinct.

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.

Create a Snurfle and see whether it can survive in different environments. As you play the game, you will learn about natural selection and animal adaptations. At the end of the game, try the multiple-choice quiz to check your...

Find out what you know about evolution by taking this post test.

Find out what you know about the evidence for evolution by taking this pre test.

Monitor the evolution of storms in the northern and southern hemispheres using data such as sea level pressures, wind speed and wave height. Records go back as far as 90 days.

Explore extensive information about a variety of Australian dinosaurs, as well as Chinese ones. The evolution of birds from dinosaurs is also described. This online exhibit offers images and facts about dinosaurs, their relatives and...

Through a series of videos and narrated animations, learn how evolution affects gene expression in species. Find out how visualizing gene expression can help explain what a specific gene does.

This multimedia article includes animations, pictures, video, biographical information, and quiz questions that are accessed by clicking on buttons along the bottom of the page. Here you can see how common genes are evidence for common...

Explore life's evolutionary history on the planet through molecular illustrations and animations. Pictorial evidence is based on origin of life research and theory.