Which of the following is absent in the cell wall of a plant?

The middle lamella is found in which of the following?

Assertion $A$: The middle lamella is present between the primary walls of two adjacent plant cells.
Reason $R$: Two adjacent cells maintain cytoplasmic contact through plasmodesmata.
Which option is correct for Assertion $A$ and Reason $R$?

Which of the following is present in the cell wall of a plant cell?

In a plant cell,the deposition of which substance on the primary cell wall leads to the formation of the secondary cell wall?

The internal layer joining the primary walls of the two adjacent cells is known as