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.

Ecosystems are organized into several different levels, and they can be studied at any one of the various levels of organization. Learn more about levels of ecological organization in this learning module produced by CK-12.

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Did you know that wetlands are frequently used as resting stops for migrating birds? This is just one of the many interesting facts found within this educational resource. This site features information on the characteristics, types, descriptions and more of various wetlands.