Question

Cell wall in diatoms is made of _______

(a) Chitin

(b) Pectin

(c) Silica

(d) Cellulose

This question was posed to me in unit test.

My doubt is from Biological Classification topic in division Biological Classification of Biology – Class 11

Answer 1

Right answer is (c) Silica

To elaborate: Cell wall in diatoms is made up of Silica. It’s a double shelled cell wall that fits exactly into each other like the lid of a box. Cell wall of diatoms remains in the earth even after they die and accumulate to form diatomaceous earth.