Multiple choice

The simplest structure that can carry out all of the activities characteristic of life are: 

  1. cells

  2. molecules

  3. atoms

  4. crystals

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

According to cell theory, the cell is the basic, simplest unit of structure and function in living things that can carry out all life processes. Atoms and molecules are not alive, and crystals are non-living structures.