What is the effect of high $CO_{2}$ concentration and higher values of $ATP/ADP$ ratio?

Diffusion, a process that occurs along the concentration gradient, is actively involved in:

Give a comparison between the following:
$(a)$ $C_{3}$ and $C_{4}$ pathways
$(b)$ Cyclic and non-cyclic photophosphorylation
$(c)$ Anatomy of leaf in $C_{3}$ and $C_{4}$ plants

Approximately $9/10$ $(85-90\%)$ of the total photosynthesis on Earth is carried out by:

In which of the following is the rate of transpiration highest?

Analogy type questions:
$(1)$ $C_4$ plants : Show $CO_2$ saturation at $360 \,\mu l L^{-1}$ :: $C_3$ plants : Show $CO_2$ saturation at concentrations above ............
$(2)$ Green plants : $H_2O$ as hydrogen donor :: Green sulfur bacteria : ............