Question

unit 2 quiz 1
all living things contain which element?
helium
sodium
copper
carbon

Explanation:

Carbon is a fundamental element for life. Organic compounds essential for living organisms, such as carbohydrates, proteins, lipids, and nucleic acids, all contain carbon. Helium is an inert gas not a key - component of living things. Sodium and copper are important for some biological functions in small amounts but are not as fundamental as carbon.

Answer:

D. Carbon