Question

Which two substances are among the six most abundant elements in living things?

A. Calcium
B. Nitrogen
C. Helium
D. Chlorine

Answer 1

the answer is B. Nitrogen

Step-by-step explanation:

The six most common elements in living things are carbon, hydrogen, oxygen, Nitrogen, phosphorus, and sulfur.

Answer 2

the answer is Nitrogen

The most common elements in living things are CHNOPS : Carbon Hydrogen Nitrogen Oxygen Phosphorus and Sulfur