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NEET Biology The Living World / जीव जगत Question Bank Understanding Life

  • question_answer
    Which of the following is a trace element required only in small amounts by most living things

    A)            Oxygen

    B)            Iron

    C)            Nitrogen

    D)            Hydrogen

    Correct Answer: B

    Solution :

                 Iron is component of haemoglobin of RBC of blood and helps in transportation of oxygen (about 97-99%) as well as carbon dioxide (about 23%).


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