Unit 2 Biology Diffusion 4.0 / 5 based on 3 ratings ? BiologyGCSEAll boards Created by: Becca WaddellCreated on: 11-01-11 15:48 Diffusion Diffusion is the passive/ random movement from an area of high concentration to an area of low concentration. This means that gas particles in the air are all spread out. This is the way in which things move in and out of cells. 1 of 1
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