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character: Ecosystem Energy Flow
topic: Ecological Efficiency
grade: 12
subject: Biology
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character: Trophic Levels
topic: Energy Transfer in Ecosystems
grade: 12
subject: Biology
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character: Food Chains
topic: Efficiency of Energy Transfer
grade: 12
subject: Biology
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character: Biomass Pyramids
topic: Energy Efficiency in Ecosystems
grade: 12
subject: Biology
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