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Figure shows the effect of light on the ...

Figure shows the effect of light on the rate of photosynthesis. Based on the graph, answer the following questions:
(a) At which points (A, B or C) in the curve is light a limiting factor?
(b) What could be the limiting factor/s in region A?
(c) What do C and D represent on the.curve?

Text Solution

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(a) B
(b) Carbon dioxide concentration and quantity of water may be limiting factor in regions A.
(c) C represents that rate of photosynthesis remains the same, even by increasing light intensity because some other factor like `CO_(2)` has become limiting. D is the light saturation point i.e., light intensity when the maximum amount of photosynthesis is achieved.
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