Middle lamella is made up of

Select the correct combination of the statements regarding the characteristics of the middle lamella:
$a$. It holds the different neighbouring cells together.
$b$. It is composed of $Mg$ pectate only.
$c$. It gets dissolved during the ripening of fruits.
Correct statements is/are:

What is the cell wall of higher plants composed of?

$A$ plant cell is distinguished from an animal cell by the presence of which of the following features?

The middle lamella between plant cells is composed of which substance?

The chemical component found in abundance in the middle lamella is ...... .