Explore natural selection by controlling the environment and causing mutations in bunnies.

Use butterflies, mice, or finches to illustrate how natural selection changes populations. Each group has a different interactive animation that illustrates the concept.

[Free Registration/Login may be required to access all resource tools.] Understand what natural selection is and how it works and explain how new species originate.

[Free Registration/Login may be required to access all resource tools.] An introduction to Charles Darwin and his theory of evolution by natural selection is offered for students. Meet the writers who influenced Darwin to develop his...

Practice exercise on natural selection. This is new content.

[Free Registration/Login Required] An informational text about adaptations and natural selection. A question sheet is available to help students build skills in reading comprehension.

[Free Registration/Login may be required to access all resource tools.] Covers Darwin's theory of evolution by natural selection.

Try these five multiple-choice quiz questions about Charles Darwin's Theory of Natural Selection.

Build a dam in the middle of an ecosystem and observe how the population of plants and animals adapt to their new environment with this science simulation. Learn how the populations adapt to survive in their new habitat. Then remove the...

[Free Registration/Login may be required to access all resource tools.] Describes how natural selection changes allele frequency.

Investigate how selection pressures and natural selection influence populations growth with this computer model. Understand how a population changes when selection pressures are in conflict. Perform the virtual lab to see what happens to...

Examine Charles Darwin's voyage on the HMS Beagle and his ideas about evolution and natural selection.

This page has a Java simulation that demonstrates allele frequency and natural selection. Choose various numbers for this simulation and run the experiment.

[Free Registration/Login may be required to access all resource tools.] Overview of the basic concepts behind evolution.

Practice exercise on Hardy-Weinberg Equilibrium.

Work samples, phenomena, assessment templates, and videos that directly address standard MS-LS4-4: natural selection.

You are a bird hunting moths (both dark and light) that live on trees. As you capture the moths most easily visible against the tree surface, the moth populations change, illustrating the effects of natural selection. (Free usage is...

Darwin's theory of evolution explains how species of living things have changed over geological time in order to survive in the changing environment. A link to a test is provided.

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.

In this biology lab students will compare two sample populations of sunflower seeds. Comparison of the two populations will be done through the generation of a histogram for each population. One population will be black oil sunflower...

This lesson will introduce the process of natural selection. It is 2 of 5 in the series titled "Natural Selection."

This lesson will introduce the process of natural selection. It is 1 of 5 in the series titled "Natural Selection."

This lesson discusses how and why plants and animals adapt to their surroundings over time. It is 3 of 4 in the series titled "Speciation and Natural Selection."

This lesson discusses how and why plants and animals adapt to their surroundings over time. It is 4 of 4 in the series titled "Speciation and Natural Selection."