character: Nitrogen Cycle Overview
topic: Introduction to Nitrogen Cycle
grade: 9
subject: Biology
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character: Decomposers
topic: Role of Decomposers in Nutrient Cycling
grade: 9
subject: Biology
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character: Nitrogen Fixation
topic: Processes of Nitrogen Fixation
grade: 9
subject: Biology
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character: Ecological Importance
topic: Ecological Role of Nitrogen in Ecosystems
grade: 9
subject: Biology
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