'Photosynthesis is the conversion of light energy within a plant' was first stated by

Evaluate the following statements regarding $T$. $W$. Engelmann's experiment:
$1.$ $T$. $W$. Engelmann stated that chlorophyll present in algae absorbs light of green and orange colors,splits water molecules by photolysis,and releases $O_2$.
$2.$ Aerobic bacteria accumulate near the algae to utilize the released $O_2$.

The oxygen produced during photosynthesis comes from the photolysis of water was first proved by:

The hypothesis that all photosynthetic organisms require a source of hydrogen was first proposed by

In which plant did Melvin Calvin experiment using radioactive isotopes to discover the first stable product of the $C_3$ cycle?

$A$ milestone contribution to the understanding of photosynthesis was made by Cornelius van Niel,which was based on the studies of