Question

How does the carbon dioxide necessary for photosynthesis enter plants? a. through their roots b. through openings in the leaves called stomata c. the plants produce their own complete supply d. none of the above

Answer 1

The answer is b. there are small holes in the undersides of the leaves called the stomata. If you were to pull the leaves off of a plant then, it would die from lack of carbon dioxide.

Answer 2

the option B is correct ..
<em />reason :
       stomata are openings present in leaves specially at lower epidermis .. from there carbondioxide enters into the leaves and gets attach with the wet surfaces inside the leaf.. thus enters into the process of photosynthesis ..