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Choose a chapter from the menu at the left or from the Table of Contents below. |
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 Science News: Natural Resources and Pollution Get the latest reports on issues affecting the environment. |
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Chapter 1: Cells: The Building Blocks of Life Chapter 2: Cell Processes and Energy Chapter 3: Genetics: The Science of Heredity Chapter 4: Modern Genetics Chapter 5: Changes over Time Chapter 6: Bacteria and Viruses Chapter 7: Protists and Fungi Chapter 8: Introduction to Plants Chapter 9: Seed Plants Chapter 10: Sponges, Cnidarians, and Worms Chapter 11: Mollusks, Arthropods, and Echinoderms Chapter 12: Fishes, Amphibians, and Reptiles |
Chapter 13: Birds and Mammals Chapter 14: Animal Behavior Chapter 15: Bones, Muscles, and Skin Chapter 16: Food and Digestion Chapter 17: Circulation Chapter 18: Respiration and Excretion Chapter 19: Fighting Disease Chapter 20: The Nervous System Chapter 21: The Endocrine System and Reproduction Chapter 22: Populations and Communities Chapter 23: Ecosystems and Biomes Chapter 24: Living Resources |
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