Cells are composed of
A
A. Carbon, hydrogen, nitrogen and oxygen
B. Sodium, potassium, calcium and hydrogen
C. Hydrogen, carbon, sodium, and potassium
D. Nitrogen, oxygen, calcium and carbon
A
A. Carbon, hydrogen, nitrogen and oxygen
B. Sodium, potassium, calcium and hydrogen
C. Hydrogen, carbon, sodium, and potassium
D. Nitrogen, oxygen, calcium and carbon