The element present in the middle lamella is

What is the outermost layer of a plant cell?

What is the nature of the cell wall in terms of permeability?

Which one of the following is a non-protoplasmic cell inclusion?

$RBC$ and a plant cell (with thick cell wall) are placed in distilled water. The solute concentration is the same in both the cells. What changes would be observed in them?

Which of the following determines the shape of the cells and provides a strong structural support to prevent the bacterium from bursting or collapsing?