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

For the process of photosynthesis,all except one of the following items are essential. Point out the exception.

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.

Which of the following is/are the raw material$(s)$ for photosynthesis?
$I$. $H_{2}O$
$II$. $CO_{2}$
$III$. Light
$IV$. Chlorophyll
Choose the correct option.

$A -$ Calvin cycle starts with the carboxylation of $RuBP$.
$R -$ Photorespiration starts with the oxygenation of $RuBP$.

Assertion $:-$ There is not a complete one-to-one overlap between the absorption spectrum of chlorophyll $a$ and the action spectrum of photosynthesis.
Reason $:$ Most of the photosynthesis takes place in the blue and red regions of the spectrum,but some photosynthesis does take place at the other wavelengths of the visible spectrum.