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

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

Green plants and green sulphur bacteria,which prepare their organic food themselves with the help of sunlight,are known as:

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 is a unique event that provides the basis for life on this planet?

In which of the following,oxygen does not evolve during photosynthesis?