Select the incorrect statement.

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(A) The cell walls of diatoms are embedded with silica and thus are indestructible. They form large deposits of 'diatomaceous earth' over billions of

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The cell walls of diatoms are easily destructible.

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(A) The cell walls of diatoms are embedded with silica and thus are indestructible. They form large deposits of 'diatomaceous earth' over billions of years. Diatoms are the chief producers in the oceans and are microscopic organisms that float passively in water currents (plankton). Therefore,the statement that their cell walls are easily destructible is incorrect.

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