Diatoms are also called 'pearls of the ocean' why? What is diatomaceous earth?
Ans. Diatoms are also known as the pearls of the ocean since they are the main producers in the marine world. Their walls are composed of silica and leave behind a considerable amount of cell deposits in their environment. This substance is known as diatomaceous earth. Diatomaceous earth has a gritty texture and is used in polishing and oil and syrup filtration.