All of Earth's Life-Forms are Based On

Question

All of Earth's life-forms are based on
A) hydrogen.
B) nitrogen.
C) oxygen.
D) carbon.
E) phosphorus.

Accepted Answer

Carbon is the central element in all organic molecules, including carbohydrates, lipids, nucleic acids, and proteins. These molecules are the building blocks of life, and therefore, all living organisms on Earth are based on carbon.