The significance of light and chlorophyll in photosynthesis was discovered by

$PGA$ was discovered as the first product of $CO_2$ fixation in the photosynthesis of:

If a photosynthesising plant releases oxygen containing more than the normal amount of $^{18}O$,it is concluded that the plant has been supplied with:

Name the scientist who first suggested that plants purify foul air through the bell jar experiment.

Which scientist demonstrated that only the green parts of plants are capable of releasing oxygen?

The importance of light and chlorophyll in photosynthesis was discovered by ......