Diffusion (4): High concentration to low concentration, Is passive (gases/liquids/solutes), Can occur with or without a membrane, How CO2 and O2 are transported in a leaf, Osmosis (3): High concentration (of water) to low concentration (of water), Requires a membrane with water channels, Is passive (water), Active Transport (4): Low concentration to high concentration, Requires energy, Helps to accumulate mineral ions in root hair cells, Needs special proteins in the cell membrane,

Diffusion, Osmosis, Active Transport

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