Multiple choice

In bony fishes, the salt balance is regulated by the kidneys and excess salts are eliminated at the

  1. fins

  2. gills

  3. scales

  4. operculum
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In bony fish, the gills play a major role in osmoregulation. They actively transport excess salts out of the body to maintain internal salt balance.

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