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belka [17]
2 years ago
9

Why do fish have gills​

Biology
1 answer:
Marta_Voda [28]2 years ago
4 0

Answer: Like us, fish also need to take in oxygen and expel carbon dioxide in order to survive. But instead of lungs, they use gills. ... As the fish opens its mouth, water runs over the gills, and blood in the capillaries picks up oxygen that's dissolved in the water.

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An atom of element A has 103 protons. What would the element's atomic number be?
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The atomic number of an atom is the number of protons it has, and if the atom is neutral, it will also be the number of electrons. Therefore:

The atom you're talking about has 103 protons, and an atomic number of 103.


Hope it helped,


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Pigeons learn to flap their wings to avoid shock ________ easily than they learn to peck a disk to avoid shock. they learn to fl
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Answer:

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In a chemical reaction, a reactant binds to an enzyme at a region know as the?
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The scientist who proposed the chromosomal theory of inheritance​
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