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:

Discuss the concept of entropy
Explain the first and second laws of thermodynamics

A narrated lesson exploring the causes and affects of various disorders of the digestive system. [7:15]

This pathway explores how we inherit our phenotypes and the origin of genetic diseases.

Obsessive-Compulsive Disorder is an anxiety disorder that affects the "worry thoughts" that a person has. One way to think about OCD is to think about superstitions. When you do something a certain way or avoid a situation, such as walking under a ladder, you're doing so to avoid bad luck. People with OCD make up their own rituals and stick to them very strongly. Read more about Obsessive-Compulsive Disorder, what causes it, and how it can be treated.

This resource on binge eating disorder answers questions concerning the risks, problems, signs, and symptoms associated with this eating disorder.

This site from the MayoClinic.com provides great information on the seasonal affective disorder, or SAD. The article includes sections such as: overview, signs and symptoms, causes, screening, diagnosis, and treatment.

This Medline Plus site explains what cartilage is, and then discusses different disorders and their treatments. Also includes links to organizations and directories for related information.

Students learn about the strength of bones and methods of helping to mend fractured bones. During a class demonstration, a chicken bone is broken by applying a load until it reaches a point of failure (fracture). Then, working as biomedical engineers, students teams design their own splint or cast to help repair a fractured bone, learning about the strength of materials used.

Robert Herrick's "Delight in Disorder" is presented and the author asks the reader to identify the poetic variations in meter and rhyme in this poem. Good exercise.