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Question
Which of the following are micro-organisms that can live within the pore interstices of sedimentary and even igneous rocks to depths of several kilometers?
Options:
A .  Lithotroph
B .  Hemotrophs
C .  Lithophiles
D .  Phototrophs
Answer: Option C
MICRO-ORGANISMS THAT CAN LIVE WITHIN THE PORE INTERSTICES OF SEDIMENTARY AND EVEN IGNEOUS ROCKS TO DEPTHS OF SEVERAL KILOMETERS ARE REFERRED TO AS LITHOPHILES. SOME OF THESE MICO-ORGANISMS ARE KNOWN TO LIVE ON SURFACE ROCKS, AND MAKE USE OF PHOTOSYNTHESIS FOR ENERGY.

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