Question

How many of the following animals in the given box are ureotelic?

Frog

Pigeon

Lizards

Humans

Cockroach

Answer 1

Ureotelic organisms:

1. The organisms that excrete urea—a nitrogenous waste product—are known as ureotelic organisms.
2. It is a significant property of terrestrial creatures, including humans, because it uses less water for excretion than ammonia.
3. Frogs: As they spend most of their time on land, frogs are ureotelic, which means that their principal nitrogenous waste is urea, which is less harmful than ammonia. Tadpoles, on the other hand, secrete ammonia as nitrogenous waste since they dwell in the water.
4. Pigeon: Because uric acid is the final byproduct of nitrogen metabolism, birds are uricotelic. The dorsomedial coelomic cavity contains the three-lobed avian kidney in a specific region.
5. Lizards: Uricotelic animals are reptiles that excrete nitrogenous wastes as uric acid in the form of pellets or paste with a minimal loss of water. Uricotelic creatures are animals that emit uric acid in the form of feces. Compared to urea and ammonia, uronic acid is the least soluble in water and the least harmful. Examples include lizards, birds, and snakes.
6. Humans: Since urea is excreted by humans as a waste product, they are ureotelic. Urea is less harmful than ammonia, the body can retain it there for longer. The excess proteins in the body are broken down through the deamination process, in which the liver removes the NH2 group from the protein and changes it into ammonium ions.
7. Cockroach: They are not ureotelic, cockroaches. Since they produce nitrogenous waste in the form of uric acid, they are referred to as “uricotelic.”

Among the listed animals:

1. Humans and adult frogs are ureotelic.
2. Pigeons, cockroaches, and terrestrial lizards are uricotelic.