A) When water is not available camels do not produce urine but store urea in tissues
B) Salmon fish excretes lot of stored salt through gill membrane when in fresh water
C) Paramecium discharges concentrated salt solution by contractile vacuoles
D) The body fluids of freshwater animals are generally hypotonic to surrounding water
Correct Answer: A
Solution :
Camel is called as Ship of Desert due to its adaptations for xerophytic environment. Camel excretes a highly concentraed urine to conserve water and can also tolerate desiccation up to 40% cellular content.
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