NEET AIPMT SOLVED PAPER SCREENING 2010

  • question_answer
    Some hyperthermophilic organisms that grow in highly acidic (pH 2) habitats belong to the two groups called

    A) eubacteria and archaea

    B) cyanobacteria and diatoms

    C) protists and mosses

    D) liverworts and yeasts

    Correct Answer: A

    Solution :

    Thermophiles live in very hot places, typically from 60° to 80°C. Many thermophiles (some eubacteria and archaebacteria) are autotrophs and have metabolisms based on sulphur. Some thermophilic archaebacteria form the basis of food webs around deep-sea thermal vents, where they must withstand   extreme temperature and pressures. Archaebacteria can grow in highly acidic (pH =0.7) and very basic - (pH =11) environments.              


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