character: Ms. Rivera
topic: Decomposers and Nutrient Cycling in Ecosystems
grade: 9
subject: Biology
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character: Mr. Thompson
topic: Energy Flow in Ecosystems
grade: 9
subject: Biology
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character: Dr. Harris
topic: Ecological Roles of Bacteria
grade: 9
subject: Biology
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character: Ms. Chang
topic: The Carbon Cycle and Its Importance
grade: 9
subject: Biology
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