NEET UG 2016 — Photosynthesis in Higher Plants

Phytochrome is a:

The process which makes a major difference between ${C}_{3}$ and ${C}_{4}$ plants is:

A plant in your garden avoids photorespiratory losses, has improved water use efficiency, shows high rates of photosynthesis at high temperatures and has improved efficiency of nitrogen utilization. In which of the following physiological groups would you assign this plant?

Emerson's enhancement effect and red drop have been instrumental in the discovery of: