Life Science: Exploring the Wonders of Life
Unit 1: Cells – The Building Blocks of Life
Unit 2: Genetics and Heredity
Unit 3: Classifying Life
Unit 4: Ecosystems and Energy Flow
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174.1 What is an Ecosystem?
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18The Components of an Ecosystem
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194.2 Food Chains, Food Webs, and Energy Pyramids
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20Following the Flow of Energy
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214.3 The Water, Carbon, and Nitrogen Cycles
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22The Circle of Life: Understanding Cycles in Nature
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234.4 Symbiosis and Interdependence
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244.5 Threats to Ecosystems and Biodiversity
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25Ecosystem Exploration