Explain the role of diffusion in gas exchange in plants. ...


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5th Form - Homeostasis and Excretion

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Question:

Explain the role of diffusion in gas exchange in plants.

Author: MissScarrott




Answer:
Oxygen diffuses from the leaf, out of the stomata, into the air as it is produced in photosynthesis. Carbon Dioxide diffuses into the leaf along a concentration gradient to be used as a reactant in Photosynthesis. This only happens in the day. At night, there is a higher rate of respiration than photosynthesis so gas exchange reversed.


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