The statement "The amount of $CO_2$ absorbed and $O_2$ released during photosynthesis are in equal volumes" was proved by:

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:

The law of limiting factors in photosynthesis was proposed by Blackman in $1905$. Which of the following scientists criticised this law?

Which statement was provided by Julius Von Sachs?

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?

Explain the experiment of Jan Ingenhousz.