Question

(a)Explain how does the exchange of gases occur in plants across the surface of stems, roots and leaves​

Answer 1

ANSWER :

In plants there are tiny pores called stomata on leaves and lenticels in stem which facilitate the exchange of gases. Carbon dioxide is taken in and oxygen given out {during photosynthesis} and vice versa during respiration.

Answer 2

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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.

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