Biology · PHOTOSYNTHESIS IN HIGHER PLANTS

According to Blackman's (1905) Law of Limiting Factors, when a physiological process is governed by multiple separate factors, the rate of the process is determined by:

1. A
   The factor that is available in maximum abundance relative to all others.
2. B
   The arithmetic average of the concentrations of all participating environmental factors.
3. C
   The factor which is nearest to its minimal value, directly affecting the process if its quantity is changed.
4. D
   The intensity of incident light exclusively, regardless of carbon dioxide availability.