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 how hormones regulate the excretory system
Discuss the role of hormones in the reproductive system
Describe how hormones regulate metabolism
Explain the role of hormones in different diseases

In this lesson, to be used with the program Understanding the Opioid Epidemic, students will explore the misperception of safety associated with prescription opioid painkillers. They will understand the differences between prescription drug use, misuse, and abuse. [7:29]

In this lesson, to be used with the program Understanding the Opioid Epidemic, students will explore the dangers of opioids and what effects they have on whole communities. They will use critical thinking skills to think about ways the opioid crisis could be minimized. [23:01]

In this lesson module, to be used with the program Understanding the Opioid Epidemic, students will understand that addiction is medically classified as a disease. They will learn about brain structure and functioning and how they are affected by opioids. [15:17]

This lesson module is to be used with the program Understanding the Opioid Epidemic. Students will learn the definitions for "opioid" and "epidemic" terms. Students will also research factors that led to the current opioid epidemic as well as other epidemics throughout history. [15:37]