character: Decomposition Dave
topic: Role of Decomposers in Nutrient Cycling
grade: 9
subject: Biology
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character: Soil Sally
topic: Importance of Soil Microorganisms in Ecosystems
grade: 9
subject: Biology
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character: Nutrient Nancy
topic: Nutrient Pools and Fluxes in Ecosystems
grade: 9
subject: Biology
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character: Cycle Sam
topic: Biogeochemical Cycles in Nature
grade: 9
subject: Biology
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