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 an animal’s diet should be balanced and meet the needs of the body
Define the primary components of food
Describe the essential nutrients required for cellular function that cannot be synthesized by the animal body
Explain how energy is produced through diet and digestion
Describe how excess carbohydrates and energy are stored in the body

By the end of this section, you will be able to do the following:

Describe the functions proteins perform in the cell and in tissues
Discuss the relationship between amino acids and proteins
Explain the four levels of protein organization
Describe the ways in which protein shape and function are linked

A great site for understanding Amino Acids, the building blocks for protein. Besides a very complete summary, the site includes a complete list of amino acids, a link to basic amino acid structure, a list if atoms in amino acids, and links to test yourself. Very informative!

This pathway provides an overview of the four classes of biological molecules (lipids, carbohydrages, proteins and nucleotides) and how they are assembled.

Here you can learn about biochemistry, the chemistry of the living world. Content explores carbohydrates, lipids, amino acid structure and proteins, enzymes, nucleic acids, and metabolism.

Students investigate the relationship between proteins and amino acids digested in the small intestine while examining overall cell structure and function.

At DNA from the Beginning, choose from classical genetics, molecules of genetics, genetic organization and control. Each concept is explained through animation, an image gallery, video interviews, biographies and links.

Explore the convept that DNA and proteins are key molecules of the cell nucleus.

Read Francis Harry Compton Crick's Nobel Lecture entitled "On the Genetic Code," which was originally given by Crick December 11, 1962.

Weeds present problems in farm fields—they rob sunlight, nutrients, and water from the crops. What can farmers do? Herbicides are one answer, but they may not do enough as some weeds have developed resistance. Students investigate an unknown weed to determine if it has resistance. This unit features 2 lessons and 5 files. Lessons are aligned to NGSS.

This pathway outlines the process of genetic engineering with a focus on gene cloning. This pathway also provides an introduction for the ABE lab series.

Understandable lessons about numerous aspects about the composition, function, and interactions of proteins. Each starts with an interactive quiz and links to a tutorial.