Give only the functions of the following
(a) Stomatal pore
(b) Guard cell

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Solution

a. Stomatal pore- It allows carbon dioxide to diffuse into leaf for photosynthesis. Water vapour and oxygen leave the leaf through the stomatal pores.
b. Guard cell- Guard cell facilitate gas exchange into and out of the plant by closing and opening the stomatal pore. It regulates the rate of transpiration.

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