Question

Where does most of the carbon dioxide that a land plant uses in photosynthesis

come from?
OA. A plant's flowers
OB. The atmosphere
OC. A plant's roots
OD. The Sun

Answer 1

Land plants obtain most of the carbon dioxide they use in photosynthesis from the atmosphere.

Step-by-step explanation:

Most of the carbon dioxide that a land plant uses in photosynthesis comes from the atmosphere. Plants take in carbon dioxide from the air through tiny openings called stomata on their leaves. The carbon dioxide is then used by the plant during the process of photosynthesis to produce glucose and oxygen.

Learn more about Carbon Dioxide in Photosynthesis