UNIT 1:  The Nature of Life
Chapter 1:  The Science of Biology
Chapter 2:  The Chemistry of Life

UNIT 2:  Ecology
Chapter 3:  The Biosphere
Chapter 4:  Ecosystems and Communities
Chapter 5:  Populations
Chapter 6:  Humans in the Biosphere

UNIT 3:  Cells
Chapter 7:  Cell Structure and Function
Chapter 8:  Photosynthesis
Chapter 9:  Cellular Respiration
Chapter 10:  Cell Growth and Division

UNIT 4:  Genetics
Chapter 11:  Introduction to Genetics
Chapter 12:  DNA
Chapter 13:  RNA & Protein Synthesis
Chapter 14:  Human Genome
Chapter 15:  Genetic Engineering

UNIT 5:  Evolution
Chapter 16:  Darwin's Theory of Evolution
Chapter 17:  Evolution of Populations
Chapter 18:  Classification
Chapter 19: History of Life

UNIT 6:  Microorganisms to Plants
Chapter 20:  Viruses and Prokaryotes
Chapter 21:  Protists & Fungi
Chapter 22:  Introduction to Plants
Chapter 23:  Plant Structure & Function
Chapter 24:  Plant Reproduction & Response

UNIT 7:  Animals
Chapter 25:  Introduction to Animals
Chapter 26:  Animal Evolution & Diversity
Chapter 27:  Animal Systems - I
Chapter 28:  Animal Systems - II
Chapter 29:  Animal Behavior
Chapter 30: The Human Body

Texas Edition note:

The topics for Chapters 1-29 in our 2015 Texas Edition are identical to those of the Macaw book. Chapter 30, however, is unique to the Lone Star State.