34
QuizMultiple Choice

Photosynthesis in Plants

Question 34 • TX-Environmental Systems B

How does the carbon dioxide necessary for photosynthesis enter plants?

Answer
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

Explanation

Carbon dioxide enters a plant from the air through tiny openings in its leaves called stomata. The roots absorb water and minerals, but they do not take in the carbon dioxide needed for photosynthesis. Therefore, the correct choice is “through openings in the leaves called stomata.”

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