Which of these statements most accurately describes how carbon dioxide enters a leaf?
a. CO2 is carried by water in leaf veins.
b. CO2 is pulled in by leaf veins.
c. CO2 diffuses by way of the stomata.
d. CO2 enters a leaf through osmosis.
Carbon dioxide enters the leaf through openings usually found on the underside of the leaf called the stomata. Carbon dioxide passes through the stomata through diffusion, a passive process.
