character: Professor White
topic: Understanding Cell Membrane Permeability
grade: 9
subject: Science
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character: Dr. Green
topic: Introduction to Cell Structure
grade: 9
subject: Science
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character: Ms. Blue
topic: Diffusion and Osmosis in Cells
grade: 9
subject: Science
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character: Mr. Red
topic: Factors Affecting Membrane Transport
grade: 9
subject: Science
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