In the middle lamella of plant cell walls,one of the main elements is

Which structure provides protection to the cell and holds the outer parts of the cell in place?

Assertion $A$: The cell wall is present as an outer covering around the plasma membrane.
Reason $R$: The cell wall is semi-fluid and functionally dynamic.

Write the importance of plasmodesmata.

Identify the correct pair.

The addition of new molecules to the pre-existing cell wall is known as .........