character: Biology Textbook
topic: Concentration Gradient and Diffusion
grade: 9
subject: Biology
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character: Cell Membrane
topic: Membrane Transport and Diffusion
grade: 9
subject: Biology
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character: Osmosis
topic: Water Movement Across Membranes
grade: 9
subject: Biology
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character: Passive Transport
topic: Mechanisms of Substance Movement
grade: 9
subject: Biology
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