Question

According to the ‘Blackman’s law of limiting factor’, at a particular time, photosynthesis can be limited by

(a) CO₂ concentration

(b) light

(c) Both (a) and (b)

(d) Either (a) or (b)

Answer 1

Answer is : (d) Either (a) or (b)

According to Blackman’s law, when a process depends on a number of factors, its rate is limited by the pace of the slowest factor. Therefore, at a particular time, photosynthesis can be limited by CO₂ concentration or light.