Gateways to Biology Table of Contents 1.1 Safety TE ......................................................................................................... 1.1 A–1.1 E SE ...................................................................................................................... 1–5 1.2 Nature of Science TE ......................................................................................................... 1.2 A–1.2 H SE .................................................................................................................... 6–17 1.3 Water: The Molecule of Life TE ......................................................................................................... 1.3 A–1.3 H SE .................................................................................................................. 18–41 1.4 The Dawn of Life TE ......................................................................................................... 1.4 A–1.4 F SE .................................................................................................................. 42–66 1.5 History of Life on Earth TE ......................................................................................................... 1.5 A–1.5 D SE .................................................................................................................. 67–81 2.1 Internal Environment of Organisms TE ......................................................................................................... 2.1 A–2.1 H SE ................................................................................................................ 83–105 2.2 Balance of Internal Environment TE .......................................................................................................... 2.2 A–2.2 J SE .............................................................................................................. 106–118 2.3 Maintaining Internal Balance in the Human Body TE ......................................................................................................... 2.3 A–2.3 H SE .............................................................................................................. 119–135 2.4 Responding to Our Environment TE ......................................................................................................... 2.4 A–2.4 H SE .............................................................................................................. 136–153 2.5 Maintaining Internal Balance: Defending the Body From Disease TE .......................................................................................................... 2.5 A–2.5 L SE .............................................................................................................. 154–173 Understanding Life on Earth 1 1 Understanding Homeostasis 2 2
