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NEET Biology Evolution Of Life Question Bank Self Evaluation Test - Evolution

  • question_answer
    How has the free \[{{O}_{2}}\] been released into the earth's atmosphere as there was no free \[{{O}_{2}}\] at the time of origin of life?     

    A) By catabolic activity of animals

    B) By photosynthetic activity

    C) By heating of the earth

    D) None of the above

    Correct Answer: B

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