12. Examine the statements regarding the cell wall.
a) It is a living, rigid structure.
b) It is an outer covering for the plasma membrane of fungi and plants.
c) Its functions include giving shape, protection from damage, and cell-to-cell interaction.
d) In algae, the cell wall is made of cellulose, galactans, mannans, and minerals like calcium carbonate.
e) The primary wall of a young plant cell is incapable of growth.
f) The secondary wall is formed on the outer side of the primary wall.
g) The middle lamella is mainly made of calcium pectate and glues neighbouring cells together.