Multiple choice

What are all LIVING things made of?

  1. air

  2. molecules

  3. atoms

  4. cells

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

According to cell theory, all living organisms are composed of one or more cells, which are the basic structural and functional units of life. While living things are also made of atoms and molecules, these non-living components are not unique to living organisms.