character: Biology Basics
topic: Concentration Gradient and Diffusion
grade: 9
subject: Biology
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character: Cell Membrane
topic: Selective Permeability
grade: 9
subject: Biology
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character: Osmosis
topic: Water Movement Across Membranes
grade: 9
subject: Biology
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character: Active Transport
topic: Energy-Dependent Movement of Molecules
grade: 9
subject: Biology
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