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:

Explain why and how passive transport occurs
Understand the osmosis and diffusion processes
Define tonicity and its relevance to passive transport

Biology, The Cell is an unit of study no. 3 of the Biology full course. It is grounded on studying cells, including cell structure, structure and function of plasma membranes, metabolism, cellular respiration, photosynthesis, cell communication, and cell reproduction.

This second-semester course will cover several of the tools needed to study chemistry at a more advanced level. We will identify the factors that affect the speed of a reaction, learn how an atom bomb works on a chemical level, and discover how chemistry powers a light bulb. We will end with discussion of organic chemistry, a topic that is as important to biology as it is to chemistry. (Chemistry 102; See also: Biology 106)