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3 years ago

Unlike freshwater fish, saltwater fish

Biology

1 answer:

Olin [163]3 years ago

7 0

The best answer is A

Saltwater fish are hypotonic to their surroundings. This means their blood has a higher water concentration than the surrounding sea water.

Due to the fact that there is more salt and less water outside their bodies, there is a tendency to take in salt and lose water.

To counter this, salt water fish drink a lot of the sea water and urinate very little. Special cells in the gills actively eliminate salt at the cost of extra energy and these fishes do not absorb any salt from the water they drink.

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Answer:

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Explanation:

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<h2>Evolution </h2>

Explanation:

Genetic drift

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The founder effect and the bottleneck effect are cases in which a small population is formed from a larger population which means they may experience strong drift for generations
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Natural Selection

Natural selection is a selection pressure which operates in a population and allow the best fitted genotype to survive in changing environmental conditions and eliminate the other genotype which are not fit
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