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Chapter 5: The Chemistry of Life
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Chapter 5: The Chemistry of Life

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Questions and Answers

What percentage of the human body is comprised of the major elements carbon, hydrogen, nitrogen, and oxygen?

  • 1%
  • 0.1%
  • 99%
  • 65% (correct)

    • Which of the following elements is classified as a minor element in the human body?

  • Iron
  • Sulfur (correct)
  • Hydrogen
  • Lithium

    • What is the approximate number of naturally occurring elements that are essential for life?

  • 40
  • 30
  • 20
  • 24 (correct)

    • Which of the following elements is classified as a trace element in the human body?

    <p>Cobalt</p> Signup and view all the answers

    What percentage of the human body is comprised of the essential elements?

    <p>99%</p> Signup and view all the answers

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