alleryWhy may extra light fail to increase photosynthesis at high light intensity?
AWater is no longer a reactant
BAnother factor becomes limiting
CChlorophyll stops absorbing all light
DThe Calvin cycle needs no energy
Answer & Solution
Correct answer: B. Another factor becomes limiting
At low light intensity, light limits CO2 fixation. At higher intensity, CO2 supply or another factor can limit the rate, so extra light has little effect.
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