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Nostrana [21]
3 years ago
6

Help Fast, Only answer if you know the answer!!!

Biology
2 answers:
jolli1 [7]3 years ago
8 0
You can make a solution saturated by adding more solute so letter B
mash [69]3 years ago
3 0
It’s letter B. That is the answer
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Alina [70]

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d. Inspiration involves muscular contractions and expiration is passive

Explanation:

Breathing is the process of taking air in and out of the body or more specifically taking oxygen in and moving carbon dioxide out of the body. Our respiration rate is regulated by medulla in brain and alter according to our activities.

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Rasek [7]

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