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← Nature & AnimalsWhich outcome occurs in CAM plants during the night due to temporal separation of pathways?
A)CO2 fixation via PEP carboxylase✓
B)Photorespiration exceeding photosynthesis
C)Rubisco directly fixing atmospheric CO2
D)Stomata fully open for gas exchange
💡 Explanation
During the night in CAM plants, CO2 fixation via PEP carboxylase occurs because stomata open at night to minimize water loss, allowing CO2 to be converted into a four-carbon acid. Therefore, CO2 fixation results, rather than photorespiration, Rubisco fixation due to daytime constraints or open stomata which exacerbate water loss.
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