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Question
Which one of the following have high CO2 compensation point?
Which one of the following have high CO2 compensation point?
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Solution
The correct option is A C3 plants
At the carbon dioxide compensation point, there is no net evolution of carbon dioxide gas because the rate of photosynthesis (which consumes carbon dioxide) is equal to the rate of respiration (which evolves carbon dioxide).
It is higher in C3 plants as compared to the C4 plants. This is due to the process of photorespiration in C3 plants, which increases the output of carbon dioxide.
Consequently the neutral point i.e., compensation point is achieved at a higher atmospheric carbon dioxide concentration. Photorespiration is absent in C4 plants.
Hence, comparatively less carbon dioxide is evolved, and the neutral point i.e., compensation point is achieved at a lower atmospheric carbon dioxide concentration.
So, the correct answer is C3 plants
At the carbon dioxide compensation point, there is no net evolution of carbon dioxide gas because the rate of photosynthesis (which consumes carbon dioxide) is equal to the rate of respiration (which evolves carbon dioxide).
It is higher in C3 plants as compared to the C4 plants. This is due to the process of photorespiration in C3 plants, which increases the output of carbon dioxide.
Consequently the neutral point i.e., compensation point is achieved at a higher atmospheric carbon dioxide concentration. Photorespiration is absent in C4 plants.
Hence, comparatively less carbon dioxide is evolved, and the neutral point i.e., compensation point is achieved at a lower atmospheric carbon dioxide concentration.
So, the correct answer is C3 plants
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