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9th Class Science Natural resources Question Bank Natural Resources

  • question_answer
    Which of the following processes provides most of the oxygen found in the earths atmosphere?

    A) Photosynthesis  

    B)        Aerobic respiration

    C) Excretion                      

    D) Fermentation

    Correct Answer: A

    Solution :

    Photosynthesis provides most of the oxygen found in the earths atmosphere.


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