TREE PHYSIOLOGY
PHOTOSYNTHESIS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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carbon dioxide and light intensity
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oxygen and light intensity
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temperature and carbon dioxide
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temperature and oxygen
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Detailed explanation-1: -As it is normally present in the atmosphere at very low concentrations (about 0.04%), increasing carbon dioxide concentration causes a rapid rise in the rate of photosynthesis, which eventually plateaus when the maximum rate of fixation is reached.
Detailed explanation-2: -Light intensity: Though the plant gets water and carbon dioxide, it can’t photosynthesize without light. Increasing the light intensity will raise the rate of photosynthesis.
Detailed explanation-3: -Elevated [CO2] increases the availability of carbon in leaves causing greater Rubisco activity and higher rates of photosynthesis.
Detailed explanation-4: -Final answer: Factors which affect the rate of photosynthesis are carbon dioxide, water, sunlight and chlorophyll.