At a certain brightness of light , gaseous exchange from photosynthetic region steps. This brightness is called-

C O_{2}

compensation point

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Light saturation point

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Light compensation point

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C O_{2}

saturation point

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Solution

The correct option is A $C O_{2}$ compensation point
The compensation point is the light intensity on the light curve where the rate of photosynthesis exactly matches the rate of cellular respiration.
In assimilation terms, at the compensation point, the net carbon dioxide assimilation is zero.
So, the correct option is 'CO2 compensation point'

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The compensation point of CO2 for C3 plants is

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