Terrestrial animals are generally either ureotelic and not ammonotelic. Why ?

Explanation

`" "`Ammonia is highly toxic and readily soluble in water, hence it should be eliminated from the body quickly in a very dilute solution.
`" "` Aquatic animals oare surrounded by water, so water conservation is not a problem for them. In this manner, they are continuously eliminating ammonia.
`" "` On the other hand, terrestrial animals have to conserve water. They cannot waste water. So ammonia in diluted form can.t be eliminated continuously. Since ammonia is highly toxic, it has to be converted to less toxic form, like urea or uric acid.
`" "` Urea is 1,00,000 times less toxic than ammonia and requires less water for their excretion. Uric acid is less toxic than urea and being insoluble in water can be excreted as semi solid waste or pellets with very little water. This is the great advantage for animals with little access to water.