Multiple choice

The smallest unit of all living things is a(n)

  1. atom

  2. cell

  3. molecule

  4. tissue
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The cell is the basic structural, functional, and biological unit of all known living organisms. While atoms and molecules are smaller, they are not considered living things on their own. Tissues are larger structures made up of many cells working together.

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