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  1. Plants adapted to low light intensity have
    1. larger photosynthetic unit size that the sun plants
    2. higher rate of CO2 fixation that the sun plants
    3. more extended root system
    4. leaves modified to spines
Correct Option: A

They have larger photosynthetic unit size so that they can absorb maximum amount of light of the Photosynthetically Active Radiation (PAR) for photosynthesis.



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