Answers PA Human Anatomy Physiology A 2026-2027 SMITH IC Elements of Living OrganismsQuestion 21

21

AssignmentMultiple Choice

Elements of Living Organisms

Question 21 • PA Human Anatomy & Physiology A 2026-2027 SMITH IC

Which element is considered the most versatile element in living organisms and why?

Answer

A

hydrogen, because it provides most of the mass of human bodies

B

hydrogen, because it can be found in both organic and inorganic molecules

C

carbon, because it can bond with many elements to form complex molecules

D

carbon, because it provides strength to the important protein, keratin

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