what are uricotelic , ammonotelic ,ureotelic

Dear Student,

The 3 major groups of animal wastes are:

1. Uricotelic - The organisms that excrete nitrogenous wastes as uric acid in the form of pellet or paste with a minimum loss of water are called uricotelic animals. Fr examples, Birds that cannot afford to loose water like humans or fishes, therefore they have developed a mechanism to excrete waste loosing least amount of water. Uric acid is only a little soluble in water and hence can be excreted by loosing only a small amount of water.

2.Ammonotelic - Those organisms which excrete nitrogenous wastes in the form of ammonia are called as ammonotelic. Ammonia is highly soluble in water and for its elimination a lot of water is required. Aquatic animals live in abundance of water and can afford to loose a lot of water as they would gain it very easily. So, aquatic animals are ammonotelic.  

3. Ureotelic - Ureotelic animals are animals that excreate nitrogeenous wastes in the form of urea are called ureotelic. Urea  requires less water to be eliminated than ammonia and hence it has become a feature of terrestrial animals like huumans.

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