Diffusion: From high concentration → low concentration, No energy required, Oxygen from capillaries into cells, carbon dioxide out., Osmosis: From low solute concentration → high solute concentration, No energy needed, Water across a partially permeable membrane, Active transport: From low concentration → high concentration, Energy required, Minerals taken up by plant root cells., Energy (ATP) needed, Against a concentration gradient,

Comparing diffusion, osmosis and active transport

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