Hydrogen,nitrogen,carbon,and Oxygen Account for 96% of the Human Body

question 38

Multiple Choice

Hydrogen,nitrogen,carbon,and oxygen account for 96% of the human body.These elements are

• A) also the main elements in organic molecules.
• B) rare in nonhuman organisms.
• C) rare on Earth.
• D) always bonded by hydrogen bonds.
• E) All answers are correct.

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