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11.

Snakes living in the desert are mainly:

A.	Ureotelic	B.	Uricotelic
C.	Ammonotelic	D.	Aminotelic

12.

Birds are uricotelic because:

A.	They have to remove a lot of water	B.	They have to conserve water which can be done only by its insoluable nature and property of safe retention in the body
C.	They havd to conserve heat in their body	D.	They have to do away with heat

13.

In which of these organs the ammonia is converted into urea:

A.	Liver	B.	Kidney
C.	Spleen	D.	Pancreas

14.

Uricotelic excretion is found in the:

A.	Birds	B.	Mammals
C.	Elasmobranchs and amphibians	D.	All of these

15.

Which of these excretory products is found in the birds:

A.	Ammonia	B.	Urea
C.	Uric acid	D.	Allantoin

16.

Excretory product of insects is:

A.	Uric acid	B.	Fatty acids
C.	Amino acid	D.	Guanine

17.

Waste product of adenine and guanine metabloism excreted by man as:

A.	Ammonia	B.	Urea
C.	Uric acid	D.	Allantoin

18.

Tri methyl aminoxide formed as excretory material in certain marine molluscs is:

A.	Formed by deamination of amino acids	B.	Methylation of ammonia
C.	Decarboxylation of amino acids	D.	None of these processes

19.

Guanine is formed as excretory waste in:

A.	Spiders	B.	Rabbit
C.	Man	D.	All of these

20.

Which of these is not uricoteli:

A.	Insects	B.	Fresh water fishes
C.	Birds	D.	Reptiles