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Mrac [35]
3 years ago
12

What happens when the muscles in the stomach wall relax and contract?

Biology
2 answers:
Ksivusya [100]3 years ago
7 0
It’s the 2nd one! where the food is mixed with gastric juice
Norma-Jean [14]3 years ago
5 0

Answer:

the answer is the second option you gave

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Answer:

Something studied on the molecular level is the water.

Explanation:

Water is a molecule formed by two hydrogen atoms and one oxygen atom, whose chemical representation is H₂O. It is a molecule whose polarity makes it a universal solvent of other polar molecules.

The molecular level corresponds to the level of organization where two or more atoms unite to form molecules or substances, united by chemical bonds. H₂O is studied at this level due to its chemical structure.

With respect to other options:

  • <u><em>Hydrogen and oxygen</em></u><em> are atoms, and correspond to the level of atomic organization.</em>
  • <u><em>Protons</em></u><em> are particles that are part of an atom, and correspond to the subatomic level.</em>
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