Assertion : Secreting hypotonic urine is effective in reducing urinary loss of water. Reason : Hypotonic urine is more concentrated and higher in osmotic pressure than the blood.

Step-by-step solution

When there is a threat of excessive water loss from the body of the animal, then the urine excreted needs to be hypertonic and not hypotonic because excessive water loss from the body posses the threat of a rise in osmoconcentration of the blood. Since hypertonic urine is more concentrated and higher in osmotic pressure than the blood, therefore it helps in reducing the loss of water with urine. Mammals and birds can excrete hypertonic urine which is more concentrated than their blood. For this, an isotonic glomeru