In $Pinus$ needle,vascular bundles are:

Usually the lower surface of a $...$ leaf has a greater number of stomata while in a $...$ leaf they are about equal on both surfaces.

Give scientific reasons: Bulliform cells are present in maize leaves.

In which of the following is the mesophyll differentiated into palisade and spongy parenchyma?

Describe the internal structure of a dorsiventral leaf with the help of labelled diagrams.

The vertical section of a dorsoventral leaf through the lamina shows three main parts namely,epidermis,$A$,and vascular system. The epidermis,which covers the upper surface is $B$ and the lower surface is covered by $C$ of the leaf. Choose the correct combination of $A$,$B$,and $C$.