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.

How do animals digest food? Animal nutritionists determine feed rations for livestock, zoo animals, and pets related to their dietary needs but also their digestive systems. This unit will make a connection between soybean used as high protein feed and the types of digestive systems in animals. This unit features 3 lessons and 7 files. Lessons are aligned to NGSS.