Photosynthesis (Basic) 0.0 / 5 ? BiologyPhotosynthesis and transpirationGCSEEdexcel Created by: MadisonxoCreated on: 08-05-16 17:37 Where does Photosynthesis mainly occur? The leaves. 1 of 6 What happens during photosynthesis in terms of gases? Carbon dioxide diffuses in through the stomata and oxygen diffuses out through the stomata. 2 of 6 What are the four distinct layers of a leaf? Upper epidermis, the palisade layer, the spongy mesophyll and the lower epidermis. 3 of 6 What is diffusion? Diffusion is the movement of particles from an area of high concentration to an area of low concentration against a concentration gradient. 4 of 6 What is osmosis? Osmosis is the movement of water from a high concentration to a low concentration. 5 of 6 What is active transport? The movement of substances from a low concentration to an area of high concentration. This uses energy from respiration. 6 of 6
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