character: Prof. Brown
topic: Nutrient Cycling in Ecosystems
grade: 9
subject: Biology
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character: Dr. Green
topic: Photosynthesis and its Role in Nutrient Cycling
grade: 9
subject: Biology
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character: Ms. White
topic: Decomposers and Their Importance in Nutrient Cycling
grade: 9
subject: Biology
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character: Mr. Black
topic: Impact of Human Activities on Ecosystem Nutrient Cycles
grade: 9
subject: Biology
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