Who explained the scotoactive opening of stomata?

Stomata open at night and close during the day in

The graph given below shows the effect of potassium cyanide on the rate of photosynthesis of Chlorella at different light intensities. Which one of the following can be deduced from the graph?

Identify the graph that shows the effect of light intensity on the rate of photosynthesis from the four given graphs.

What is the common value of $PQ$ (photosynthetic quotient) of a leaf?

In terrestrial habitats,how are temperature and rainfall conditions primarily influenced?