Answer:
cellular respiration breaks down sugars and other molecules to use the stored energy
Answer:
Each cell has a unique chemical composition
Explanation:
All the other answers are apart of the modern cell theory.
Answer:
There is no mixing of oxygen-rich and oxygen-poor blood.
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The right atrium and right ventricle of the human heart pump oxygen-poor blood to the lungs and the left atrium receives oxygen-rich blood. They never mix.
Answer:
oxygen, carbon, hydrogen and nitrogen, a lot of it in the form of water.
Explanation:
