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Type: Multiple-Choice
Category: Respiration, Digestion, and Excretion
Level: Grade 12
Score: 1
Author: dbegley64
Last Modified: 6 years ago

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Respiration, Digestion, and Excretion Question

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Grade 12 Respiration, Digestion, and Excretion

What is breathing?
  1. the exchange of gases in the mitochondria
  2. the exchange of gases in the lungs
  3. the exchange of gases in chloroplasts
  4. the exchange of gases in the mouth