Select the correct match.

Easy

A

Urea - Some amount is retained in the kidney matrix of mammals to maintain a desired osmolarity
B

Uric acid - Requires large amount of water for its elimination
C

Ammonia - Terrestrial adaptation necessitated evolution of ammonotelism
D

Urea - Excreted in the form of pellets or paste with a minimum loss of water

Solution

Some amount of urea is retained in the kidney matrix of some animals (e.g. mammals) to maintain the desired osmolarity.

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