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Questions  >>  CBSE XI  >>  Biology
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Diatoms are also called “Pearls of the oceans”. Why? What is diatomaceous earth?

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Diatoms are the chief producers in the ocean. Being siliceous in nature, after their death, they add silica in the ocean which gets accumulated over the years forming diatomaceous earth. The cell wall of diatoms is chiefly composed of cellulose impregnated with glass like silica which shows sculpturing and ornamentations. Hence they are called “pearls of oceans”.
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