In plants, the cells necessary for exchange of gases from atmosphere are_______

Subsidiary cells

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Bark cells

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Guard cells

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Phloem parenchyma cells

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Solution

The correct option is C Guard cells
Guard cells are surrounding each stoma on the underside of the leaf. They close and open the stomata as per requirement. Stomata are involved in gaseous exchange (oxygen, carbon dioxide) with the atmosphere.

Therefore, option C is correct.

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