character: Dr. White
topic: The Nitrogen Cycle and Soil Bacteria
grade: 10
subject: Science
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character: Dr. Green
topic: Nitrogen Fixation by Bacteria
grade: 10
subject: Science
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character: Mr. Brown
topic: Impact of Soil Bacteria on Plant Growth
grade: 10
subject: Science
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character: Ms. Smith
topic: The Role of Decomposers in the Nitrogen Cycle
grade: 10
subject: Science
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