Birds are less sensitive to temporary deprivation of water, when compared to the mammals, because

Options :
  1. urea excretion in mammals entails a greater loss of water than that in birds.
  2. the water requirement per unit weight is less in birds than in mammals.
  3. absorption of water from the gut is more efficient in birds than in mammals.
  4. None of these
Answer and Explanation :-

Answer: Option 2

Explanation:

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