Question

CAM plants keep stomata closed in the daytime, thus reducing loss of water. They can do this because they a. Fix CO₂ into organic acids during the night b. Fix CO₂ into sugars in the bundle-sheath cells c. Fix CO₂ into pyruvate in the mesophyll cells d. Use photosystem I and photosystem II at night

Answer 1

CAM plants keep stomata closed in the daytime, thus reducing loss of water. They can do this because they - fix $CO{2}$ into organic acids during the night.

The correct option is a.

As an adaptation to dry environments, certain plants developed a carbon fixation mechanism known as crassulacean acid metabolism, or CAM photosynthesis, which enables a plant to photosynthesize during the day but only exchange gases at night.

During the day, the malate is transferred to chloroplasts where it is transformed back to $CO2$, which is then utilised during photosynthesis. At night, the $CO2$ is stored as the four-carbon acid malic acid in vacuoles. The enzyme RuBisCO is surrounded by a concentration of pre-collected $CO2$, which improves photosynthetic efficiency. Plants in the Crassulaceae family were the ones that initially revealed this process of acid metabolism.

To learn more about CAM plant, refer from

brainly.com/question/9292816

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