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

This lesson introduces students to the concepts of air pollution and technologies that have been developed by engineers to reduce air pollution. Students develop an understanding of visible air pollutants with an incomplete combustion demonstration, a "smog in a jar" demonstration, construction of simple particulate matter collectors and by exploring engineering roles related to air pollution. Next, students develop awareness and understanding of the daily air quality and trends in air quality using the Air Quality Index (AQI) listed in the newspaper. Finally, students build and observe a variety of simple models in order to develop an understanding of how engineers use these technologies to clean up and prevent air pollution.

If you want to check your understanding of immunology, this is the place to go. This resource has 13 different questions to test your knowledge, as well as tutorials that go with each question.

A comprehensive resource for timely and accurate medical information from experts at Mayo Clinic. Content includes information on almost all diseases and conditions, a guide to healthy living, first-aid and self-care information.

This site from the MayoClinic.com contains great information on the food allergy. The sections that are covered in the article include: signs and symptoms, causes, risk factors, screening, diagnosis, treatment and prevention.

Online presentations on more than 150 health topics, diseases, and conditions, from acne to viruses. Each plays as a slide presentation, with sound, that you can control or set to autoplay. Time varies from 5-20 minutes. Available in both Spanish and English.

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.

Students are introduced to the concepts of air pollution and air quality. The three lesson parts focus on the prerequisites for understanding air pollution. First, students use M&Ms to create a pie graph that expresses their understanding of the composition of air. Next, students watch and conduct several simple experiments to develop an understanding of the properties of air (it has mass, it takes up space, it can move, it exerts pressure, it can do work). Finally, students develop awareness and understanding of the daily air quality using the Air Quality Index (AQI) listed in the newspaper. In an associated literacy activity, students explore the environmental history timeline.