Choose the correct pairing of a similarity of marine and freshwater bony fishes, and a difference between them.

Question

Quizplus · Accepted Answer

Both marine and freshwater bony fishes lose ammonia across their gills. However, marine bony fishes produce a minimal amount of urine, whereas freshwater bony fishes produce a copious amount of dilute urine, which is a difference between them. Option A is incorrect because marine bony fishes excrete excess salt across their gills, not uric acid. Option C is incorrect because marine bony fishes excrete excess salt across their gills, whereas freshwater bony fishes conserve salt. Option D is partially correct, as both marine and freshwater bony fishes raise the osmolarity of their body fluids, but only marine bony fishes excrete excess salt across their gills. Option E is incorrect because marine bony fishes produce a minimal amount of urine, and freshwater bony fishes produce a copious amount of dilute urine.

Choose the Correct Pairing of a Similarity of Marine and Freshwater