This 10-minute introduction was prepared to accompany a lecture in Biology 100 at the University of Massachusetts, Amherst MA US . Thanks to Professor Anne Simon who outlined the content. Supported by an Instructional Technology Grant from the Office of the President of the University of Massachusetts. This tutorial runs in a fixed 640 x 480 pixel window designed for projectors with that resolution. If you have a copy of this tutorial on your computer's hard disk, you can display it in Netscape without an Internet connection .
Copies are available to be downloaded .
Version 2.0 was released January 2, 1997. It has been tested thoroughly on Windows 3.1 and Windows 95. Further changes may be needed for Macintosh and unix. Check with the original source periodically to find out if changes have been made. Significant changes will be indicated by a different version number at the top of this page.