Question

Q 20. What is the nature of cell-walls in diatoms?

Answer 1

The cell walls construction of diatomsis known as Frustule which consists of two thin overlapping shells fitting into each other just as a soap-box. Theirwalls are made up of silica. When thediatoms die, the silica in their cell wallsgets deposited in the form of diatomaceous earth.

Answer 2

➞ It consists of two overlapping shells...

➞ It's walls are made up of silica...

 ➞ When they die, silica gets deposited over it...

➞ The overlapping shells are fitted as soap box...