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    Select the wrong statement.

  • Diatoms are microscopic and float passively in water.
  • The walls of diatoms are easily destructible.
  • 'Diatomaceous earth' is formed by the cell walls of diatoms.
  • Diatoms are chief producers in the oceans.
  • Explanation:

    The wall of diatoms contain cellulose & Silica. It is called frustule. It is non-degrodable. After death it is deposited at the bottom in water & form diatomous earth.

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