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Question

Water vapor exits and CO2 enters a leaf through the


A

stomata

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B

grana

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C

porphyrin rings

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D

photons

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Solution

The correct option is A

stomata


Stoma (Plural: stomata) is a tiny opening present on the undersurface of leaves. It is a pore regulated by guard cells and gaseous exchange takes place through it. Stomata is the opening through which carbon dioxide enters the leaf and water vapour and oxygen exits the leaf.


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