Explain how does the exchange of gases occur in plants across the surface of stem , roots and leaves .
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In all the three plant parts the exchange of gases takes place through diffusion. However the surface of a young stem will have stomata, while that of an older stem will have lenticels. ... Lenticels are open pores. In roots stomatal pores as well as lenticels are absent, exchange of gases occurs through root hairs.
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The exchange of gases occur in plants across the surface of stem , roots and leaves through diffusion in lenticels.
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