Question

The figure shows the effect of light on the rate of photosynthesis. Based on the graph, answer the following questions : 

(i) At which point(s) A, B or C in the curve, light is a limiting factor ? 

(ii) What could be the limiting factor(s) in region A ?

(iii) What do region C and D represent on the curve ?

Answer 1

(i) ‘B’ 

(ii) CO₂ and temperature 

(iii) ‘C’ represents to constant rate of photosynthesis, ‘D’ is the light saturation intensity at which rate of photosynthesis is maximum.