A) increases during the day
B) decreases or increases during the day
C) increases during night
D) decreases during any time
Correct Answer: C
Solution :
In CAM plants, \[C{{O}_{2}}\] enters into the leaf and fixed to oxaloacetic acid, which is then converted to malic acid at night when stomata are open. This malic acid is stored in cells during night. So, in CAM plants, organic acids accumulate (or their concentration increases) in the dark (.i.e., at night) in vacuoles.
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