Name the substance present in cell walls of diatoms what make them hard and indestructible - Biology - Biological Classification

Question

Name the substance present in cell walls of diatoms what make them
hard and indestructible

Prasanth John Samuel · Answer

Diatoms are producers within the food chain A unique feature of
diatom cells is that they are enclosed within a cell wall made of
silica (hydrated silicon dioxide) called a frustule
silica (hydrated silicon dioxide) is the substance present in the
cell wall of diatoms