AP Biologymediummcq1 pt
CAM plants fix CO₂ at night to
A.open stomata in cool darkness and store CO₂ as malate
B.avoid using RuBisCO
C.make glucose in the dark
D.photosynthesize without chlorophyll
Explanation
Core Concept
Night fixation lets desert plants close stomata by day, cutting water loss; malate releases CO₂ for the Calvin cycle in daylight.
Correct Answer
Aopen stomata in cool darkness and store CO₂ as malate
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