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Chemolithotrophs obtain their energy from ________.

  • A.sunlight
  • B.the oxidation of organic compounds
  • C.the oxidation of inorganic compounds
  • D.the reduction of carbon dioxide

Answer: B

Correct answer: the oxidation of inorganic compounds

Chemolithotrophs oxidise inorganic substances such as ammonia, hydrogen sulphide, ferrous iron or hydrogen gas. Nitrifying and sulphur bacteria are the familiar examples, and their activity drives much of the nitrogen and sulphur cycling in soil.

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