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(D) In living organisms,the elemental composition by weight is dominated by Oxygen $(O)$,followed by Carbon $(C)$,Hydrogen $(H)$,and Nitrogen $(N)$.Ac

Vedclass · Accepted Answer

$O, C, H, N$

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(D) In living organisms,the elemental composition by weight is dominated by Oxygen $(O)$,followed by Carbon $(C)$,Hydrogen $(H)$,and Nitrogen $(N)$.According to the data provided in $NCERT$ Biology,the approximate percentage of these elements in the human body is: Oxygen $(O)$ $\approx 65\%$,Carbon $(C)$ $\approx 18.5\%$,Hydrogen $(H)$ $\approx 3.3\%$,and Nitrogen $(N)$ $\approx 3.3\%$.Therefore,the correct order of abundance is $O > C > H > N$.

Which of the following represents the correct order of elements based on their abundance in living organisms?

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