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 the main function and basic structure of stems
Compare and contrast the roles of dermal tissue, vascular tissue, and ground tissue
Distinguish between primary growth and secondary growth in stems
Summarize the origin of annual rings
List and describe examples of modified stems

In this video, learn how Leo Koch (age 9, Maine) chooses healthy foods, like those in his Healthy Lunchtime Challenge winning recipe for Vegan Superhero Soup, to fuel his competitive running and help manage his diabetes. Leo leads an active life. As a type 1 diabetic, his nutritional needs demand added scrutiny. Because the body processes nutrients in different ways, Leo analyzes foods for their protein, fat, and carbohydrate contents. [2:45] Check out the Support Materials below for Teaching Tips and a link to a customizable student handout.