When did the research on photosynthesis begin?

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:

In which of the following forms is glucose usually stored in plants?

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

During photosynthesis,the oxygen in glucose $(C_6H_{12}O_6)$ comes from which of the following?

When a rat was placed into a closed container,it got suffocated and died,but when a plant was also introduced into it,the rat survived. Who performed this experiment?