Question

NH3 is excretory waste in which of the
following:-
Bird
Amphibians
Mammals
Fishes​

Answer 1

Amphibians excrete NH3 or Ammonia as a major metabolic waste.

Answer 2

NH3 is excretory waste in fishes.

• NH3 is ammonia which is toxic nitrogenous waste and are need to be released outside the body.
• Different organisms excrete urea, uric acid or ammonia depending upon the availability of water for excretion.
• Mammals excrete urea while birds and reptiles release uric acid as a paste to conserve water.
• Amphibians produce urea as their nitrogenous waste but larvae produce ammonia.
• Fishes excrete ammonia in the water and the ammonia is produced by most the aquatic fishes and other aquatic animals.