character: Ecosystems and Energy
topic: Energy Conservation in Ecosystems
grade: 10
subject: Biology
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character: Food Chains and Webs
topic: Energy Flow
grade: 10
subject: Biology
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character: Nutrient Cycles
topic: Nutrient Cycling
grade: 10
subject: Biology
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character: Photosynthesis and Respiration
topic: Energy Transformation in Ecosystems
grade: 10
subject: Biology
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