2. Questions Bank
  3. 7th Class
  4. Science
  5. Respiration in Organisms

7th Class Science Respiration in Organisms Question Bank Respiration In Plants And Animals

  • question_answer
    Each human lungs contain _____ alveoli.

    A) 100 million                  

    B) 300 million

    C) 200 million       

    D) 400 million

    Correct Answer: C

    Solution :

    200 million      


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