1. Which of these is not an excretory organ: intestine, lungs, thyroid or kidneys?   Kidneys   Lungs   Intestine   Thyroid   Hint Half-n-half Clue   2. True or false: Capsule in which glomerulus is enclosed is known as external capsule.   True   False   3. Which is not true regarding kidneys? A. They do not have any capsule. B. They are bean shaped and reddish brown in color. C. Each kidney is divided into 2 parts - cortex and medulla. D. They are the main excretory organs.   A   B   C   D   Half-n-half Clue   4. True or False: Malpighian body is a part of nephron.   True   False   5. True or false: Kidneys contain 10-12 million nephrons.   True   False   6. Formation of urea occurs in   Small intestine   Kidneys   Liver   Pancreas   Half-n-half Clue   7. Which of these is not true -- A, B, C or D? A. Kidney excretes urea. B. A small fraction of CO2 is removed through the skin. C. Small amount of salt is excreted through skin. D. Feces is excreted through the anus.   A   B   C   D   Half-n-half Clue