What solid is found in urine?

1.   ?    ammonia
2.   ?    sodium chloride
3.   ?    urea
4.   ?    carbon monoxide

How much urine do kidneys eliminate daily?

1.   ?    none
2.   ?    1.4L
3.   ?    1.2L
   
4.   ?    1.3L

Name the mineral salts that build up during metabolism?

1.   ?    nitrogen and ammonia
2.   ?    water and carbon dioxide
3.   ?    urea and ammonium
4.   ?    potassium and sodium chloride

What is urea made up of?

1.   ?    ammonia and carbon dioxide
2.   ?    hydrochloric acid and uric acid
3.   ?    uric acid and potassium sulfate
4.   ?    uric acid and sodium chloride

How is carbon dioxide excreted through the earthworm?

1.   ?    bladder
2.   ?    lungs
3.   ?    skin
4.   ?    kidneys

What is the least poisonus substance?

1.   ?    uric acid
2.   ?    bile
3.   ?    ammonia
4.   ?    urea

Wastes are removed through the lungs, kidneys, skin and what other organ?

1.   ?    spleen
2.   ?    heart
3.   ?    pancreas
4.   ?    liver

Protists use a form of which of the following to eliminate wastes?

1.   ?    active transport
2.   ?    passive transport
3.   ?    osmosis
4.   ?    all of the above

Hydra has no what?

1.   ?    nucleus
2.   ?    contratile vacuole
3.   ?    endoderm
4.   ?    flagella

Whta do the grasshopper and the earthworm require an excretory organ?

1.   ?    no direct contact with exterenal enviroment
2.   ?    no direct contact with internal enviroment
3.   ?    highly acidic enzyme may burn the organism
4.   ?    none of the above