Urea in humans is synthesized in:
1. Kidneys | 2. Renal vein |
3. Liver | 4. Urinary bladder |
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The most toxic nitrogenous metabolic waste product is:
1. ammonia | 2. urea |
3. uric acid | 4. methane |
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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 |
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 |
A | B | C | D | |
1. | P | Q | R | S |
2. | Q | R | S | P |
3. | R | S | P | Q |
4. | S | P | Q | R |
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