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Chapter 20: Changes Through Time

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Welcome to Primate Info Net
Information about primates; includes links to primate centers and organizations. Find out about the International Directory of Primatology. What is the purpose of this organization?

Order Primates
Access this site for detailed information about primates. Which living primates are the smallest? Which are the largest? Into what two large groups are living primates divided?

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On the Origin of Species by Means of Natural Selection, By Charles Darwin
Here is the text of Darwin's book online. Read Darwin's introduction, and explain when he first got his ideas for this book.

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.

Enter Evolution: Theory and History
Visit this site to learn more about the scientists whose ideas contributed to the development of the theory of evolution. Write an entry in your journal entry pretending that you are a dinosaur researcher from the 1800s, explaining your theories.

Virtual Galapagos: Wildlife
Here is a portion of a site on Darwin and evolution. This page discusses Darwin's work with finches. Make your own poster with a chart like the one shown on this page and display it in your classroom.

Unit 4: Foundations of Life

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Molecular Modeling
This site shows various models of molecules, which can be manipulated the help of the Chemscape Chime Plug-in. Visit this site and explain the importance of having three-dimensional models.

Chemical Models
This page has illustrations of some different common organic molecules. Visit this site and compare the different ways to model these molecules. Make your own molecules using ball and stick models.

Plants National Database
The USDA sponsors this site, which provides a database of standardized information on plants. Click on Photo Gallery to view photographs of various categories of plants, including noxious plants and crops. Use the information on this site to write an article about plants for a class newsletter.

Virtual Garden
Follow the link to this site featuring detailed information for gardeners. Use the information on this site to plant your own class garden.