What is difference between ammonotelic and uricotelic organisms?

1.	What is difference between ammonotelic and uricotelic organisms?
Answer» Ammonotelism :(i) Excretory waste is ammonia (NH3).(ii) It is characteristic of aquatic animals such as protozoans, sponges, coelenterates, crustaceans,bony fishes andechinoderms etc.(iii) Excess of water is required to eliminate ammonia. It is highly toxic.(iv) Water loss is about 300-500 ml to remove one gram of ammonia.(v) Ammonia is formed in liver cells by the deamination of the amino acids.Uricotelism :1.Excretory waste is uric acid.2. It is characteristic of terrestrial reptiles and insects. All the birds are uricotelic.3.Much less water is needed. Uric acid is least toxic.4.Water loss is about 10 ml to excrete out one gram of uric acid.5.Uric acid is formed mainly from the purines in liver cells. In insects, uric acid is formed in malpighian tubules.

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