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Types of Animals Based on Excretory Wastes MCQ - Practice Questions with Answers

Edited By admin | Updated on Sep 18, 2023 18:34 AM | #NEET

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  • Types of Animals Based on Excretory Wastes is considered one of the most asked concept.

  • 15 Questions around this concept.

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Which one of the following options gives the correct categorisation of six animals according to the type of nitrogenous wastes (A,B,C), they give out?

A

AMMONOTELIC

B

UREOTELIC

C

URICOTELIC

 

Uricotelic mode of passing out nitrogenous wastes is found in

Uric acid is the chief nitrogenous component of the excretory products of

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Types of Animals Based on Excretory Wastes

Ammonotelism:

  • The process of excreting ammonia is Ammonotelism.
  • Many bony fishes, aquatic amphibians and aquatic insects are ammonotelic in nature.
  • Ammonia, as it is readily soluble, is generally excreted by diffusion across body surfaces or through gill surfaces (in fish) as ammonium ions. 
  • Kidneys do not play any significant role in its removal.

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.

Uricotelism:

  • Reptiles, birds, land snails and insects excrete nitrogenous wastes as uric acid in the form of a pellet or paste with a minimum loss of water and are called uricotelic animals.

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Types of Animals Based on Excretory Wastes

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