Refer to the graph attached. The relationship between x and y is exponential and

Question

Refer to the graph attached. The relationship between x and y is exponential and reaches a threshold or saturation (maximum rate of net photosynthesis). Which of the following is correct? Photosynthesis for this plant occurs between PAR of 1500 mu mol/m^2/s. PAR at 1500 mu mol/m^2/s will increase maximum rate of net photosynthesis. A net CO_2 uptake equal to 0 means that there is no respiration occurring. The light saturation point is the same for all plants. Respiration rates are changing as a function of changing photosynthesis.

Explanation / Answer

1,D.....,Different plants (even different leaves on the same plant) show differences in the shape of their light response curves, which reveals characteristics of the underlying photosynthesis processes including the light-dependent and light-independent reactions, the efficiency at which light is utilized by photosynthesis, and even the rate of O2 uptake.

2, A,B ,C and E are true.

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