character: Dr. Lee
topic: Transport Mechanisms in Cells
grade: 9
subject: Biology
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character: Mr. Johnson
topic: Cell Membrane Structure and Function
grade: 9
subject: Biology
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character: Ms. Smith
topic: Diffusion and Osmosis
grade: 9
subject: Biology
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character: Dr. Wang
topic: Active Transport vs Passive Transport
grade: 9
subject: Biology
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