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Question

Which of the following plants are low carbon dioxide compensation plants i.e. thrive well at even low carbon dioxide concentrations

A
C3- plants
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B
C4- plants
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C
C2- plants
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D
Alpine plants
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Solution

The correct option is B C4- plants
C4- plants that follow the Hatch-Slack cycle or the C4 cycle thrive well at even low carbon dioxide concentrations.
By following this cycle, such plants overcome the tendency of the enzyme RuBisCO to wastefully fix oxygen instead carbon dioxide in the process of photorespiration.
This is achieved by ensuring that RuBisCo works in an environment where there is a lot of carbon dioxide and very little oxygen.
Therefore, C4 plants are more efficient at fixing carbon in drought, high temperatures, and limitations of nitrogen or carbon dioxide.

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