Identify the correct statement for diatoms.

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Their walls are embedded with calcium oxalate.

Diatoms actively float on the surface of oceans.

'Diatomaceous earth' is depositions of the cell wall of diatoms.

The walls of diatoms are easily breakable.

answer is B.

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Detailed Solution

Diatoms are microscopic and float passively in water currents (plankton). The walls are embedded with silica and thus the walls are indestructible. Accumulation of cell wall deposits over billions of years in their habitat forms ‘diatomaceous earth’.

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