The wall that separates the nasal cavity and nostrils into right and left sides is the Septoplasty.
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Answer:
The reproductive system.
Explanation:
Without the reproductive system, humans are not able to reproduce meaning the human species would go extinct. With the reproductive system, humans are able to create more humans, in this way humans do not go extinct.
Answer:
Top soil
Explanation:
It keeps all of the others below. we are able to plant and grow things on it.
The ocean holds about 97% of the Earth's water. So I'm guessing it's the ocean.
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