Photosynthesis is:

Assertion : Cyclic pathway of photosynthesis first appeared in some eubacterial species.
Reason : Oxygen started accumulating in the atmosphere after the non-cyclic pathway of photosynthesis evolved.

Read the following table and choose the correct pair.
$I$. $DCMU$ Herbicide: Inhibitor of non-cyclic electron transport
$II$. $PMA$ Fungicide: Reduces transpiration
$III$. Colchicine Alkaloid: Causes male sterility
$IV$. Soilrite Sodium alginate: Encapsulation of somatic embryos

$I.$ Photosystem-$I$ is a photosynthetic pigment system located on the appressed part of grana and thylakoids.
$II.$ Photosystem-$II$ is a photosynthetic pigment system located on the non-appressed part of stroma only.
Identify whether the given statements are correct or incorrect and choose the correct option accordingly.

What is the unique process which has supported life on this planet?

For photosynthesis (i.e. for the synthesis of organic matter),the green plants need only