Urea in humans is synthesized in:

1. Kidneys 2. Renal vein
3. Liver 4. Urinary bladder
Subtopic:  Nitrogenous Excretory Products |
 81%
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The most toxic nitrogenous metabolic waste product is:

1. ammonia 2. urea
3. uric acid 4. methane
Subtopic:  Nitrogenous Excretory Products |
 92%
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Uricotelic mode of passing out nitrogenous wastes is found in

1. reptiles and bird 2. birds and annelids
3. amphibians and reptiles 4. insects and amphibians
Subtopic:  Nitrogenous Excretory Products |
 81%

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Match each item in Column I with one in Column II and select the correct match from the codes given:
Column I
[Organism]
Column II
[Osmoregulatory and excretory structure]
A Flatworms, rotifers, Amphioxus P Protonephridia
B Earthworm Q Nephridia
C Insects R Malpighian tubule
D Prawn S Green gland or antennal gland
Codes:
A B C D
1. P Q R S
2. Q R S P
3. R S P Q
4. S P Q R
Subtopic:  Nitrogenous Excretory Products |
 93%
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