Moll's half leaf experiment was done to show ...................... was required for photosynthesis.

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

The curve showing the effectiveness of different wavelengths of light in photosynthesis was first given by Engelmann using all,except:

Match the following:

$1. 1733-1804$	$p. Jan Ingenhousz$
$2. 1730-1799$	$q. T.W. Engelmann$
$3. 1897-1985$	$r. Joseph Priestley$
$4. 1843-1909$	$s. Cornelius Van Niel$

Select the correct sequence of experiments that led to a gradual understanding of photosynthesis in green plants.