Which of the following statements is most correct concerning the movement of materials through the stomata?
a) Water moves in and O2, CO2 move out.
b) Water and O2 move out, CO2 moves in.
c) Water, CO2, and O2 move out, but only O2 moves in.
d) Water and CO2 move in, O2 moves out.
e) O2 and CO2 move in, water moves out.
Ans: b) Water and O2 move out, CO2 moves in.
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