$A$ protoplast is a cell that is:

What is the middle lamella between plant cells made of?

$I.$ Found only in sporophytic phase of life cycle
$II.$ May contain enzymes that are biologically active
$III.$ Often contain strengthening polymers
Select the correct option for cell wall

Polygalacturonoids (pectins) are the major constituents of:

Elementary fibrils of cellulose are also known as

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