BotanyThe major limiting factor for photosynthesis is 

The major limiting factor for photosynthesis is 

  1. A

    CO2 

  2. B

    Light 

  3. C

    Temperature  

  4. D

    Water

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    Solution:

    The CO2 concentration in the atmosphere is only 0.03 to 0.04% by volume. But the optimum CO2 concentration for photosynthesis in C3 plants is 0.045% by volume. In C3 plants photosynthesis is limited by CO2 concentration. Only during cloudy days and plants growing in shades, light is the limiting factor. 

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