TREE PHYSIOLOGY
PHOTOSYNTHESIS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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fix CO2 intoorganic acids during the night when temperatures are cooler.
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fix CO2 into bycombining it with RuBP in the Calvin cycle.
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obtain CO2 through their roots during the day.
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fixCO2 into organic acids in the mesophyll cells, which do not rely on stomata.
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Detailed explanation-1: -They can do this because they. fix CO2 into organic acids during the night.
Detailed explanation-2: -CAM plants close their stomata during the day and take up CO2 at night, when the air temperature is lower.
Detailed explanation-3: -The majority of CAM plants are found in hot, dry, very arid regions with little water. CAM plants undergo photosynthesis. Therefore, the stomata of such plants only open at night and remain closed throughout the day in order to prevent excessive water loss through transpiration.
Detailed explanation-4: -Stomata are mouth-like cellular complexes at the epidermis that regulate gas transfer between plants and atmosphere. In leaves, they typically open during the day to favor CO2 diffusion when light is available for photosynthesis, and close at night to limit transpiration and save water.