How many of the bio elements constituent 99% of the total human body?
Correct answer: C. 6
- A. 8
- B. 4
- C. 6
- D. None of These
Explanation
Six elements, carbon, hydrogen, oxygen, nitrogen, phosphorus and sulphur, make up about 99% of the human body's mass and form the main biological molecules. Students may choose four by remembering only carbon, hydrogen, oxygen and nitrogen, which are the most abundant elements in organic compounds.
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