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

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?

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 $O_2$.

During photosynthesis,the oxygen evolved is released from $...........$.

Isotopes popularly known to have been used in the study of photosynthesis are

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