PHOTOSYNTHESIS
C 4 PHOTOSYNTHESIS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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CAM plants close their stomata during the day.
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Cactus is a C3 plant.
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Detailed explanation-1: -If it is too hot or dry, plants often close their stomata to prevent water loss. This prevents CO2 from entering the leaf, as well as prevents O2 from exiting.
Detailed explanation-2: -C3 plants keep their stomata OPEN during the day when the sun is out and CLOSED at night when sun is not shining. The carbon dioxide can get IN and Oxygen can get OUT during the day when the stomata are open. ON hot, dry, days, water loss (transpiration) is a PROBLEM.
Detailed explanation-3: -The carbon molecule produced by the C4 plant is a four-carbon molecule, and the CAM plant produces a three-carbon molecule. The C4 plant open stomata in the day, and the CAM plant open stomata at night time.
Detailed explanation-4: -C3 plants do not have special features to combat photorespiration, while C4 plants minimize photorespiration by performing carbon dioxide fixation and Calvin cycle in separate cells. CAM plants, on the other hand, minimize photorespiration by performing carbon dioxide fixation and Calvin cycle at separate times.