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Question


Birds excrete a semi-solid, white coloured substance consisting of _________.


Options:
A .   bile 
B .   ammonia 
C .   urea 
D .   uric acid 
Answer: Option D
:
D
Nitrogenous wastes in birds is excreted as a semi-solid, white coloured substance composed of uric acid.
The excretory product in humans is urea. The excretory product in fishes is ammonia. 

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