7th Class Science Nutrition in Plants Question Bank Nutrition in Plants

  • question_answer What is the principal source of energy input to biological systems?

    A)  Carbohydrates from plants.

    B)  Light from the sun.

    C)  Nutrients from the soil.

    D)  Oxygen from the air.

    Correct Answer: B

    Solution :

    The sun is the ultimate source of energy for all living organisms.


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