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Question

Choose the option that gives the major excretory product of the organism mentioned. (Eg: Humans – Urea).


  1. Dogs – Urea, Fish – Ammonia, Birds – Uric Acid

  2.  Dogs – Ammonia, Fish – Urea, Birds – Ammonia

  3. Dogs – Urea, Fish – Ammonia, Birds – Urea

  4. Dogs – Urea, Fish – Ammonia, Birds – Ammonia


Solution

The correct option is A

Dogs – Urea, Fish – Ammonia, Birds – Uric Acid


Mammals like humans and dogs excrete urea in their urine. Fish excrete ammonia directly into the water they live in. Birds, on the other hand, excrete uric acid which is the white coloured semi-solid substance found in bird droppings. The type of excretory product depends upon the availability of water to the organism.

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