Question

Which one pair/ set exhibits uricotelism?
A. Bird, reptiles and insect
B. Fish, birds, and amphibians
C. Mammals, birds and reptiles
D. Amphibians, mammal and reptiles

Answer 1

Hint: We know that the process of elimination of all the waste materials formed in our body is known as excretion. Organisms excrete nitrogenous wastes which can be in the form of urea, ammonia, or uric acid.

Complete answer:
Let us learn about the elimination process and the different organisms that excrete nitrogenous wastes in the form of urea, ammonia, or uric acid. We should know that out of all the forms of excretion of nitrogenous wastes; ammonia is the most toxic. It is secreted by aquatic organisms mostly. Ammonia is followed by urea which is less toxic as compared to ammonia but much more toxic than uric acid. Lastly, there comes the uric acid, which is the least toxic out of the three. Uricotelism implies uric acid is available in discharge. This kind of discharge is available in those of the animals which create in an encased egg or which withstand an extremely dry earthbound climate as a grown-up living being. Uric acid is released as a strong bed or as a thick glue. It is most regularly found in winged animals, earthly reptiles, bugs, gastropods, and in certain mollusks, and so on.

We must know that uricotelism is performed by organisms which live in dry conditions and need to preserve water in their body. Some of the organisms release uric acid out of the body in the form of crystals. Birds, kangaroos, rats, most insects, and reptiles fall into this category. Humans, most cartilaginous fishes, as well as bony fishes, are considered to be ureotelic. Out of the three nitrogenous wastes, uric acid is the least soluble in water, and ammonia is the highest. The solubility of urea in water is in the medium range.

Hence, the correct answer is option (A)

Note: So the answer is that the creatures that discharge nitrogenous waste as uric acid are supposed to be uricotelic. Uric acid is the least harmful and least dissolvable in water. This sort of discharge is available in living beings that can withstand dry earthbound conditions and is most regularly found in feathered creatures, earthbound reptiles, and insects.