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An obligate halophile requires high:

  • A.pH
  • B.temperature
  • C.salt
  • D.pressure

Answer: C

Correct answer: salt

Halophile means salt-loving, and an obligate one cannot grow without a high salt concentration - the extreme haloarchaea require several molar NaCl and lyse in fresh water. Their cytoplasm is kept osmotically balanced by accumulating potassium ions or compatible solutes.

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