how O2 and CO2 are exchange in herbaceous and Woody stems
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In herbaceous plants gases are exchanged by stomata while in Woody plants it is exchanged by lenticles
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It is through stomata that oxygen from air diffuses into the stem and goes to all the stems for respiration. similarly co2 produced in the stems diffuses into stomata of herbaceous plants and lenticels of trees or large plants and goes out into the air
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