Unit 1 Introducing Biology 
1: Biology in the 21st Century
2: Chemistry of Life
Unit 2 Cells 
3: Cell Structure and Function
4: Cells and Energy
5: Cell Growth and Division
Unit 3 Genetics 
6: Meiosis and Mendel
7: Extending Mendelian Genetics
8: From DNA to Proteins
9: Frontiers of Biotechnology
Unit 4 Evolution 
10: Principles of Evolution
11: The Evolution of Populations
12: The History of Life
Unit 5 Ecology 
13: Principles of Ecology
14: Interactions in Ecosystems
15: The Biosphere
16: Human Impact on Ecosystems
17: Animal Behavior 
Unit 6 Diversity of Life 
18: The Tree of Life 
19: Viruses and Prokaryotes 
20: Protists and Fungi 
21: Plant Diversity 
22: Invertebrate Diversity
23: Vertebrate Diversity
24: Human Systems and Homeostasis
ONLINE ONLY in the © 2017 Edition 
25: Plant Structure and Function
26: Plant Growth, Reproduction, and Response
27: A Closer Look at Arthropods
28: A Closer Look at Amniotes
29: Nervous and Endocrine Systems
30: Respiratory and Circulatory Systems
31: Immune System and Disease
32: Digestive and Excretory Systems
33: Protection, Support, and Movement
34: Reproduction and Development