The carbon isotope used for the study of photosynthesis is ........

In bacterial photosynthesis,the hydrogen donor is:

Which scientist performed the experiment where a burning candle and a mouse were placed in a closed bell jar to demonstrate the role of air in the growth of plants?

What was the difference between Priestley and Ingenhousz's experiment?

If a photosynthetic plant releases $18$ $O_2$ more than usual,what must the plant have received?

Select the correct sequence of experiments that led to a gradual understanding of photosynthesis in green plants.