The chemical substance most abundantly present in the middle lamella is

$P -$ Statement: The middle lamella is composed of cellulose plates.
$Q -$ Statement: During the formation of gametes,cell division occurs by mitosis.

Plasmodesmata are........

Which of the following is not a function of the cell wall?
$(i)$ Provides shape to the cell.
$(ii)$ Protects the cell from mechanical damage and infection.
$(iii)$ Helps in cell-to-cell interaction.
$(iv)$ Provides a barrier to undesirable macromolecules.

Which substance is present in the middle lamella of a cell which holds or glues the different neighboring cells together?

The middle lamella is composed of which substance?