Question

Water vapor exits and $C{O}_2$ enters a leaf through the

• A. stomata
• B. grana
• C. porphyrin rings
• D. photons

Answer 1

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.