Which of the following cell structures is non-living?

In which of the following are the cells held together by a $Ca$-pectate layer?

Which of the following is $NOT$ found in the composition of the plant cell wall?

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:

The function of plasmodesmata is:

Which structure keeps adjacent cells in contact with each other?