Biology 2e is designed to cover the scope and sequence requirements of a typical two-semester biology course for science majors. The text provides comprehensive coverage of foundational research and core biology concepts through an evolutionary lens. Biology includes rich features that engage students in scientific inquiry, highlight careers in the biological sciences, and offer everyday applications. The book also includes various types of practice and homework questions that help students understand—and apply—key concepts. The 2nd edition has been revised to incorporate clearer, more current, and more dynamic explanations, while maintaining the same organization as the first edition. Art and illustrations have been substantially improved, and the textbook features additional assessments and related resources.

By the end of this section, you will be able to do the following:

Describe hypersensitivity
Define autoimmunity

Identify places in a typical room where "creepy crawlies" like dust mites, ants, lice and silverfish might live. Then check out places on the human body that dust mites may inhabit, and learn about the disease and other problems dust mites can cause.

WebMD's Allergies Health Center is your one-stop place for information on allergies. Contains news articles, fact sheets, tips for beating allergies, plus more.