1.

Organisms require at least 27 elements, out of which 15 are metals, of which they are needed in abundant quantities.

A. Potassium, manganese, molybdenum and calcium
B. Potassium, Molybdenum, Copper and Calcium
C. Potassium, sodium, magnesium and calcium
D. Sodium, Magnesium, Copper and Manganese
Answer» D. Sodium, Magnesium, Copper and Manganese


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