Provide the full names for the following abbreviations:
$(1)$ $PEP$
$(2)$ $PEPcase$

$A$ plant in your garden avoids photorespiration,has improved water-use efficiency,shows a high rate of photosynthesis at high temperatures,and has improved nitrogen-use efficiency. To which physiological group would you classify this plant?

Which one is a $C_4$ plant?

The $CO_2$ fixation during the Hatch and Slack pathway occurs in

Which of the following is a $C_4$ plant?

The $C_{4}$-plants are photosynthetically more efficient than $C_{3}$-plants because