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In Addition to Hydrogen, Carbon and Oxygen, the Elements Required

Question 16

Multiple Choice

In addition to hydrogen, carbon and oxygen, the elements required in the greatest amount by most living things are:


A) Potassium, nitrogen, and sulfur
B) Sulfur, potassium, and calcium
C) Calcium, magnesium, and iron
D) Iron, sodium, and chlorine
E) Nitrogen, phosphorus, and potassium

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