Which one of the following categories of organisms does not evolve oxygen during photosynthesis?

Choose the incorrect sentences for chloroplast.
$(1)$ The chloroplast membranous system consists of grana and the fluid stroma.
$(2)$ Pigments are present in the stroma.
$(3)$ In the stroma,enzymatic reactions incorporate $CO_2$ into the plant,leading to the synthesis of sugar.
$(4)$ Light is not required for the formation of sugar in the stroma.

Which branch of Botany is concerned with the study of photosynthesis?

Major utilisation of carbon from the atmosphere is through

The process of uptake of $CO_2$ and release of $O_2$ by plants is called ...

The mean photosynthetic rates of $C_3$ and $C_4$ plants per $dm^2$ per hour are respectively: