Question

explain how does exchange of gases occur in Plants across the surface of stems​

Answer 1

Explanation:

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

Answer:

The exchange of gases in roots of a plant takes place by the process of diffusion. During diffusion, oxygen diffuses into the root hairs and passes into the root cells, from where the carbon dioxide moves out into the soil

Explanation:

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