Allow gases to diffuse from palisade cell to air/air to palisade cell
List 3 adaptations of a leaf for efficient photosynthesis
Broad (large surface area) This (short diffusion distance) Palisade cells have many chloroplasts (containing chlorophyll) Veins bring water/remove sugar Stomata allow carbon dioxide in/oxygen out Transparent epidermis Palisade cells near top of leaf Air spaces Large surface area to volume ratio
Photosynthesis stops Glucose used up by respiration Water concentration in guard cell increases Water leaves guard cell by osmosis Guard cell becomes flaccid and changes shape Stomata closes
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