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character: Ecological Efficiency
topic: The Concept of Energy Transfer Efficiency Among Trophic Levels
grade: 11
subject: Biology
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character: Trophic Levels
topic: Energy Flow in Ecosystems
grade: 11
subject: Biology
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character: Energy Transfer
topic: Food Chains and Food Webs
grade: 11
subject: Biology
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character: Biomass
topic: Productivity in Ecosystems
grade: 11
subject: Biology
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