how does exchange of gases occur in plant across stem root and leaves explain
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The carbon dioxide required by the plant is obtained through tiny pores present on the surface of the leaves called stomata. Note that the exchange of gases occurs across the surface of stems, roots and leaves as well. Water used in photosynthesis is taken up from the soil by the roots in terrestrial plants. Other materials like nitrogen, phosphorus, iron and magnesium are taken up from the soil.
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Explanation:
through stomata, having stomatal pores which helps in exchanging of gases. opening and closing of stomata is held by guard cells. it swells in order to take water and shrinks when at the phase of not taking water
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