Most of the plants contain a green colouring pigment which is responsible for photosynthesis. This pigment was named chlorophyll by

What is the by-product of bacterial photosynthesis?

Which of the following did the scientist Melvin Calvin use to discover the biosynthetic pathway of photosynthesis?

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 $O_2$.

Englemann $(1882)$ observed the accumulation of aerobic bacteria around the blue and red light regions of a chloroplast in the green alga $Cladophora$. He therefore concluded that:

Two plants $A$ and $B$ are supplied with $CO_2$ with $H_2O^{18}$ and $CO_2^{18}$ with $H_2O$ respectively. Which of the following plants releases $O^{18}$ type oxygen in photosynthesis?