A chemical substance that can be formed from the ionic bonding of an anion and a cation would be Al2O3.
Answer: Your brain constantly gets signals from your body which detect the amount of oxygen and carbon dioxide in your blood. Your brain will send signals to the muscles involved in breathing and adjust your breathing rate depending on how active you are.
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Answer:
Fermentation allows production of energy without oxygen. This is helpful for conserving oxygen.
Explanation: