Multiple choice

Put the levels of organization in order from simple to complex.

  1. organ, organ system, cell, organism, tissue

  2. cell, organ, tissue, organ system, organism

  3. organism, organ system, organ, tissue, cell

  4. cell, tissue, organ, organ system, organism
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The biological levels of organization start with the simplest unit, the cell. Multiple cells of the same type form tissues, which combine to make organs. Organs work together in organ systems, which ultimately make up a complete multicellular organism.

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