Question

Excretion of uric acid in insects and birds is of great advantage.WHY??

Answer 1

Insects and birds are generally referred to as Uricotelics. This are the type of land animals, including arachnid(eg insects) and aves, which excrete nitrogenous waste in the form of uric acid. 

The process of elimination of uric acid after the deamination of proteins, however, requires a lot of energy but has the following major advantages to the organism:

1) The thick white uric acid paste formed requires very little amount of             water, hence making this a very efficient elimination mechanisms in             terms of water preservation. This also helps the animal to reduce the          amount of water required.
2) The molecules of the uric acid can remove large amounts of nitrogen         waste compared to the molecules of other elimination compounds such     as ammonia and urea.
3) The uric acid is less toxic and can be stored easily in the body tissues
     of these organism without any toxic effects.