Question

Select the correct option:

A typical light response curve of photosynthesis is shown. The limiting factors/s for photosynthesis at M and N is/are

• A. temperature and $C{O}_2$ respectively
• B. $C{O}_2$ and light respectively
• C. only $C{O}_2$
• D. light and $C{O}_2$ respectively.

Answer 1

The correct option is B $C{O}_2$ and light respectively

Blackman gave the law of limiting factors according to which any process conditions when a large number of factors are there, the rate of the process is limited by the pace of the slowest tractor.

Carbon dioxide is usually a limiting factor of photosynthesis under field condition.

The ultimate source of light for photosynthesis is the sun. For green plant, it can also act as the limiting factor.

So, the correct option is 'CO2 and light respectively'