Practice exercise on natural selection. This is new content.

Instructional module focusing on Charles Darwin's explanation of natural selection as the mechanism for evolution. Discusses how this force of natural selection promotes changes in species over time. Site also includes an interactive...

[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...

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

Practice exercise on Hardy-Weinberg Equilibrium.

[Free Registration/Login may be required to access all resource tools.] The theory of evolution by natural selection means that the inherited traits of a population change over time. Inherited traits are features that are passed from one...

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

[Free Registration/Login may be required to access all resource tools.] Do you ever wonder why some birds are big like ostriches and some birds are small like robins? Or why a lion has a mane while a leopard has spots? In the 19th...

How natural selection works at the level of genes, alleles, genotypes, & phenotypes.

Explains what genetic drift, gene flow, and natural selection are, and compares their differences, two at a time.

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

Discusses natural selection and explains this theory in detail in reference to the evolution of the peppered moth. Discusses how the forces of natural selection lead to other kinds of speciation and evolutionary processes.

Practice exercise on phylogeny.

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

Darwin's theory of natural selection and his ideas about evolution are explained here.

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

This simulation explores the survival of prey species individuals based on their coloring and the environment.

Instructional module focusing on the early work of Charles Darwin. Discusses Darwin's key role in supporting and describing the theory of evolution as driven by natural selection. Site also includes an interactive practice quiz and links...

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.

Explains what stabilizing selection is and how this type of natural selection actually limits genetic diversity in a population. Presents examples of stabilizing selection in different plants and animals.

Discusses conditions needed for the Hardy-Weinberg Law to hold true and demonstrates calculations involving allelic frequencies to illustrate this principle.

Teach aliens about evolution as you play this game, and review your own understanding in the process. Topics covered include evolutionary mechanisms, evidence of evolution, natural selection, reproductive isolation, population genetics,...

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...