Types of Animals Based on Excretory Wastes -
Ureotelism:
- Terrestrial adaptation necessitated the production of lesser toxic nitrogenous wastes like urea and uric acid for the conservation of water
- Mammals, many terrestrial amphibians and marine fishes mainly excrete urea and are called ureotelic animals.
- Ammonia produced by metabolism is converted into urea in the liver of these animals and released into the blood which is filtered and excreted by the kidneys.
- Some amount of urea may be retained in the kidney matrix of some of these animals to maintain the desired osmolarity.
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Mammals, many terrestrial amphibians and marine fishes mainly excrete urea and are called ureotelic animals. Hence the correct option is ureotelism
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