Question
Distinguish between Ureotelism and Uricotelism.
| No. | Ureotelism | Uricotelism |
| i. | It is the elimination of nitrogenous waste in the form of urea. | It is the elimination of nitrogenous waste in the form of uric acid. |
| ii. | Excretion of urea requires less (moderate ) amount of water. | Excretion of uric acid requires negligible amount of water. |
| iii. | Removal of 1 gm of urea requires 50 ml of water. | Removal of 1 gm of uric acid requires 5 – 10 ml of water, j |
| iv. | Urea is less toxic. | Uric acid is least toxic. |
| e.g. | It is generally seen in terrestrial animals. Mammals, cartilaginous fishes (sharks and rays), many aquatic reptiles, most adult amphibians, etc. | It is seen in birds, some insects, many reptiles, land snails, etc. |
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