A terrestrial animal must be able to:

A terrestrial animal must be able to:
  1. excrete large amounts of water in urine
  2. conserve water
  3. actively pump salts out through the skin
  4. excrete large amounts of salts in urine.

Solution

Terrestrial animals (mammals and semi-terrestrial adult amphibians) cannot use water freely for excretion because of less availability in the environment, so ammonia is converted into a less toxic and easily soluble product, urea. Terrestrial animals must osmoregulate to maintain contant internal osmolarity.

Asked in: NEET 2004

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