2nd Class Science Our Environment Question Bank Our Environment

  • question_answer Most of the living organism's need_____ to breathe.    

    A)          Nitrogen                       

    B)  Oxygen

    C)  Carbon dioxide 

    D)  None of these

    Correct Answer: B

    Solution :

    (b) Most of the living organisms inhale oxygen. Mainly human beings and animal require oxygen for breathing.

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