In which of the following aspects do photosynthetic bacteria differ from green plants?

In plants,the uptake of $CO_2$ and the release of $O_2$ is a process called .........

Which would do maximum harm to a tree?

Consider the following statements.
$I.$ The portion of the spectrum between $300-500 \;nm$ is also referred to as Photosynthetically Active Radiation $(PAR)$.
$II.$ Magnesium,calcium and chloride ions play prominent roles in the photolysis of water.
$III.$ In cyclic photophosphorylation,oxygen is not released (as there is no photolysis of water) and $NADPH$ is also not produced.

Sugars extracted from sugarcane and sugar beet differ in:

Provide the differences between:
$(1)$ Light reaction (Light phase) and Dark reaction (Biosynthetic phase)
$(2)$ Mesophyll cells and Bundle sheath cells