character: Dr. Liu
topic: Diffusion and Osmosis
grade: 9
subject: Biology
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character: Student A
topic: Cell Membrane Structure
grade: 9
subject: Biology
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character: Student B
topic: Factors Affecting Diffusion
grade: 9
subject: Biology
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character: Teacher
topic: Types of Solutions (Hypertonic, Hypotonic, Isotonic)
grade: 9
subject: Biology
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