Question

What are ammoniatelic and ureotelic animals? Give examples

Answer 1

ammoniatelic- animals whose excretory product is ammonia eg. all fishes as ammonia require a large amount of h2o to be excreted out
ureotlic- animals whose excretory product is urea eg. cockroach , lizards as in order to reduce water stress or to use minimum quantity of h2o urea is is excreted out from them as a excretory product.

Answer 2

Ammonotelic animals

• An ammonotelic organism excretes nitrogenous waste as soluble ammonia.
• Ammonia the product or waste formed is highly toxic.
• Highly-soluble, therefore needs plenty of water for its excretion

Example

• Most of the aquatic animals including protozoans, crustaceans, platyhelminths, cnidarians, poriferans, echinoderms, fishes, larvae/tadpoles of amphibians are ammonotelic.

Ureotelic animals

• A ureotelic organism excretes excess nitrogen as urea.
• Urea is less toxic and needs less water in comparison to Ammonia.
• The uricotelic organism excretes uric acid or its salts. In contrast to Ammonia and Urea, Uric acid is the least toxic and the most limited soluble in water.

Example

Ureotelic organisms include cartilaginous fish, few bony fishes, adult amphibians and mammals including humans.