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NEET Biology The Living World / जीव जगत Question Bank Critical Thinking

  • question_answer
    If you go back in the history approx. 4500 million years back when atmosphere was reducing the organism were                [CPMT 2001; MP PMT 2001; BVP 2003; BHU 2003]

    A) Autotroph, aerobic                             

    B) Chemo-autotroph, anaerobic

    C) Chemo-heterotroph, anaerobic

    D) Heterotroph, anaerobic

    Correct Answer: C

    Solution :

      The first living organisms developed in reducing atmosphere were chemo-heterotrophs as they required ready-made organic materials as food and anaerobes as they were capable of respiration in the absence of oxygen.


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