Kranz anatomy is found in ............

What is the primary $CO_2$ acceptor in $C_4$ plants?

The net requirement of assimilatory power for the formation of $6$ hexose molecules in a maize plant is:

In most plants,stomata open during the day and close at night. What is the exception to this?

Some of these terms/chemicals are associated with the $C_{4}$ cycle. Explain.
$(a)$ Hatch-Slack pathway
$(b)$ Calvin cycle
$(c)$ $PEP$ carboxylase
$(d)$ Bundle sheath cells

The $CO_2$ concentration at which $C_4$ plants show saturation is about (in $ppm$)