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:

Identify the shared characteristics of the natural sciences
Summarize the steps of the scientific method
Compare inductive reasoning with deductive reasoning
Describe the goals of basic science and applied science

Critical reading is an essential skill to analyze research papers. This pathway dissects each section of an article to help the learner understand its logic and structure.

This video discusses how to determine whether the results of a statistical experiment can be generalized to a larger population. Includes downloadable study guide with exercises - guide also covers other topics. [5:07]

Differentiate between different levels of scientific evidence using this infographic. Discover eight distinct levels of scientific evidence arranged in a pyramid that reflects a spectrum of quality. This resource was developed in partnership with Dr. Katrine Wallace, an epidemiologist, educator and science literacy influencer.

At the end of your experiment you should review all of the data you have collected. See samples of data analysis charts and graphs. Find out what makes for a good chart or graph using the self-grading rubrics.

Watch Toolbox Todd problem solve to fix a robot to get him going again. [1:16]

Observe how the Sun's appearance in the sky affects the length of daylight in locations at different times of the year in this media gallery from WGBH. Use the time-lapse video and animated videos to compare and describe how changes in the position of the Sun in the sky results in changes in the length of daylight hours during different times of the year. Support materials include: Background Reading, Teaching Tips, and Discussion Questions.

The World Wildlife Fund offers a comprehensive overview of climate change, also known as "Global warming." Content includes basic information about the process and its effect on the environment, the science to back it up, conservation results, featured projects, and information on what you can do to help.