Photosynthesis is a:

Give scientific reasons:
$(1)$ Green plants form the basis of life on Earth.
$(2)$ Photosynthesis is a complex metabolic process.

$A$ small mesophytic twig with green leaves is dipped into water in a big beaker under sunlight. It demonstrates

Blackman demonstrated that increasing illumination increased the photosynthetic rate up to a point when $CO_2$ becomes limiting. If light was not limiting,temperature becomes limiting. Emerson found that maximum $CO_2$ fixation could be achieved with brief flashes of light. Mark the correct statement in the following:

Which of the following evidence indicates that the oxygen released during photosynthesis is derived from water?

Match the following columns:

Column-$I$	Column-$II$
$A$. Light reaction	$1$. Membranous system
$B$. Dark reaction	$2$. $NADPH$ and $ATP$ product
	$3$. Starch

Select the correct matching: