Click the Techie Toolbox for tips and help to make the most of your time on the Web.

Chapter 22: Immunity

Mechanisms of Bacterial Pathogenicity
Visit this site to learn about body defenses against pathogens. In your Science Journal, describe the two groups of host defense mechanisms and give an example of each. What are the two abilities that enable pathogenic bacteria to evade these host defenses?

AIDS Vaccines
This site of the National Institute of Allergy and Infectious Diseases provides comprehensive information about the development of AIDS vaccines. Click on the Science link to learn more about research in this field. What three factors are important to the success of a clinical trial for AIDS vaccines?

AIDS Center Home Page
Follow the link to this site of the University of Rochester Medical Center to find out about ongoing clinical trials.

Ask NOAH about: Cancer
Visit this site to find information about various aspects of cancer. Click on the links to find out what cancer is and how it is treated. What types of cancer are preventable?

Unit 6: Interactions in the Living World

The Particle Adventure
Visit this site for an interactive tour of the atom. View the movie and click on the link for an introduction to the fundamental particles and forces. How have scientists’ views of the fundamentals changed over time?

Virtual Chloroplast
Click on the links and follow the instructions to explore the organization of the plant chloroplast. View the movie that shows light absorption.

DNA Structure Movie
At this site you’ll find a movie about the structure of DNA. View the movie, then sketch a diagram of a DNA molecule in your Science Journal.

The Gene Letter
Find out more about how genetic disorders occur by accessing this article. In the case of X-linked recessive disorders, why don’t the sons of affected fathers also have the disorders?