Assertion   :       Ammonia should be eliminated from the body as rapidly as it is formed.

Reason      :       Ammonia is insoluble in water.

Assertion   :       Urinary bladder and ureters are lined by transitional epithelium.

Reason      :       Ureters carry the urine to urinary bladder where it is stored temporarily.

Assertion   :       Sharks are said to be ammonotelic animals.

Reason      :       Sharks can retain considerable amounts of ammonia in their blood.

Assertion   :       Aquatic mammals like whales and seals are said to be ureotelic animals.

Reason      :       It is because of the fact that their main nitrogenous waste product is urea.

Assertion   :       Death ensues if waste products are not removed from the body.

Reason      :       Excretory system removes the nitrogenous waste products from the body.

Assertion   :       Camel can go without water for long periods.

Reason      :       Camels stores water in the pouches of their rumen and fat in their hump.

Assertion   :       Earthworms excrete both ammonia and urea.

Reason      :       Excretion in earthworm depends on the environment.

Assertion   :       Birds can considerably reduce water loss in the urine.

Reason      :       Birds store urine along with faeces in the cloaca.

Assertion   :       The glomerular filtrate resembles the protein free plasma in composition and osmotic pressure.

Reason      :       The glomerular capillary wall and inner membrance of Bowman’s capsule are impermeable to large molecules.

Assertion             :       Kidneys maintain the osmotic concentration of the blood.

Reason      :       Kidneys eliminate either hypotonic or hypertonic urine according to the need of the body.