Which one of the following statements is correct with respect to salt-water balance inside the body of living organisms?

Options

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 concentratcd salt solution by contractile vacuoles
D. The body fluids of fresh water animals arc gcncrnliy hypotonic to surrounding water.

Answer

A

Explanation

Camel excrete a highly concentrated urine to conserve water. They do not sweat till body temperature rises about `55^(@)C-60^(@)C`. Camel can also tolerate desication upto 40% cellular content.