Question

The excretory material of bony fish is
А. Urea
B. Protein
C. Ammonia
D. Amino acid

Answer 1

Hint: The discharge material of bony fishes is ammonia. So, bony fishes are ammonotelic and discharge material of rubbery fishes, like dog fish is carbamide.
The discharge and osmoregulatory organs of fishes area unit the gills and urinary organ. Excretion in bony fishes is ureotelic (ie, they expel urea) however some fresh bony fishes area unit ammonotelic (ie, expel ammonia).

Complete Answer:
- The primary internal organ in fishes, as in different vertebrates, is that the urinary organ. In fishes some excretion additionally takes place within the canal, skin, and particularly the gills (where ammonia is given off).
- Excretion in bony fishes is ureotelic (i.e, they expel urea) however some fresh bony fishes are ammonotelic (i.e, expel ammonia). The emission and osmoregulatory organs of fishes unite the gills and excretory organs.
- Compared with land vertebrates, fishes have a special drawback in maintaining their internal surroundings at a relentless concentration of water and dissolved substances, like salts.
- The correct balance of the inner surroundings (homeostasis) of a fish is during a nice half maintained by the discharge system, particularly the urinary organ.

Hence the right possibility is C Ammonia.

Note:- The kidney, gills, and skin play a crucial role in maintaining a fish’s internal surroundings and checking the results of diffusion. Marine fishes board associate degree surroundings within which the water around them contains a larger concentration of salts than they will have within their body and still maintain life.