DENDROLOGY

Detailed explanation-1: -Carbon dioxide and oxygen cannot pass through the cuticle, but move in and out of leaves through openings called stomata (stoma = “hole"). Guard cells control the opening and closing of stomata. When stomata are open to allow gases to cross the leaf surface, the plant loses water vapor to the atmosphere.

Detailed explanation-2: -Plants absorb carbon dioxide through small openings called stomata that are on the surface of the leaf. If we zoom in on a plant leaf, so close that we can see the cells, we’ll find tiny openings called stomata.

Detailed explanation-3: -The lower epidermis of a leaf contains stomata and guard cells that allow carbon dioxide to enter the leaf, and oxygen and excess water to exit the leaf.