2. Questions Bank
  3. 7th Class
  4. Social Science
  5. Ecology and Ecosystem Biodiversity

7th Class Social Science Ecology and Ecosystem Biodiversity Question Bank Understanding the Environment - Choose the Correct Option

  • question_answer
    The most important gas for living organisms is

    A) oxygen

    B) nitrogen

    C) carbon dioxide

    D) helium

    Correct Answer: A

    Solution :

    oxygen


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