Assertion-the opening and closing of the pore is a function of the guard cells. Reason-stomatal pores are the site for exchange of gases by diffusion
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REASON: Diffusion is a fast process but only occurs at the surface of the body. 3. ASSERTION: The opening and closing of the pore is a function of the guard cells. REASON: Stomatal pores are the site for exchange of gases by diffusion
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