NEETBotanyPhotosynthesis in Higher Plants
Read the following statements and choose the following option: 1. External factors affecting photosynthesis rate include mesophyll cells 2. Blackman's limiting factor comes into play when several factors affect any process 3. At any point the rate will be determined by the factor available at sub-optimal levels. 4. Including the plants in shade or in dense forests, light is rarely a limiting factor in nature.
Options
- ABoth 2 and 3 are correct
- BBoth 1 and 2 is incorrect
- COnly 2 is correct
- DOnly 4 is correct
Correct answer
A. Both 2 and 3 are correct
Step-by-step solution
When several factors affect any [bio] chemical process, Blackman’s (1905) Law of Limiting Factors comes into effect. This states the following: If a chemical process is affected by more than one factor, then its rate will be determined by the factor which is nearest to its minimal value: it is the factor which directly affects the process if its quantity is changed.