Question

Aquatic reptiles are:
(a)Ammonotelic
(b)Ureotelic
(c)Ureotelic in water
(d)Ureotelic overland

Answer 1

Hint: Aquatic animals excrete ammonia and reptiles excrete uric acid. Based on the form in which nitrogenous waste is dispelled from the body, the organisms are categorized as under three categories: Ammonotelic, Uricotelic, and Ureotelic.

Complete Answer:
Aquatic reptiles are ureotelic. The ureotelic animals are those animals that excrete urea. These include amphibians, mammals, aquatic or semi-aquatic reptiles like turtles and alligators.

Additional information:
1) Ammonotelic organisms: The organisms which excrete their metabolic waste in the form of ammonia are known as ammonotelic animals. Excretion of ammonia requires a lot of water so that more water is lost from the body. That is why such a means of excretion is suitable for aquatic organisms that have constant access to water.
2) Uricotelic organisms: Those organisms which excrete their nitrogenous waste generally in the form of uric acid and urates are known as uricotelic. Elimination of uric acid requires a lesser amount of water, comparatively less soluble in water, and is less toxic as compared to ammonia. Hence it is observed in reptiles and birds.
3) Ureotelic organisms: Those organisms that excrete their nitrogenous waste mainly in the form of urea are known as ureotelic. Urea can be stored in the body for considerable periods of time and is the least toxic. It is eliminated in the form of urine. Examples of ureotelic animals are mammals and amphibians.

So, the correct answer is ‘ureotelic’.

Note: Excretion, the process through which animals free themselves of waste products and the nitrogenous by-products of metabolism. Through excretion, animals control osmotic pressure, the equilibrium between inorganic ions and water, and sustain acid-base balance.