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11.

Olive green colour of skin of frog is due to:

A.	Xanthophores only	B.	Melanophores only
C.	Guanophores only	D.	Due to combined effect of all of these

12.

Which of the following chromatophores in frog have guanin in them:

A.	Lipophores	B.	Melanophores
C.	Iridiccytes	D.	None of these

13.

Capability to change the colour of skin in frog is termed:

A.	Metamorphosis	B.	Metachyosis
C.	Both of these	D.	None of these

14.

Some mammals also hibernate. The body temperature of these animals' remains:

A.	Same as that of surrounding	B.	Normal because of temperature regulation by skin
C.	Normal because of accumulation of fat prior to hibernation	D.	Slightly higher than that of surroundings due to combined regulation by skin and fat

15.

Temperature regulation by sweating occurs in:

A.	Fish	B.	Frog
C.	Lizard	D.	Rabbit

16.

Which of the following glands in skin are responsible for temperature regulation:

A.	Cutaneous glands	B.	Mucous glands
C.	Sweat glands	D.	Sebaceous glands

17.

Temperature regulation in animals involves:

A.	Increase in temperature according to environment temperature	B.	Decrease in body temperature according to environmental temperature
C.	Increase or decrease in body temperature with rise or fall in environmental temperature	D.	Maintenance of a constant body temperature in all conditions

18.

Excessive sweating or perspiration in mammals helps mainly in:

A.	Getting rid of excess water from body	B.	Maintaining body temperature at a constant level by losing heat
C.	Elimination of nitrogenous waste matter	D.	Elimination of excess of salts from the body

19.

Poikilothermy in the animals means:

A.	0? body temperature	B.	Fluctuating body temperature
C.	Contant body temperature	D.	Temperature resistance by the body

20.

Skin of frog is characterized by the absence of:

A.	Scales	B.	Muscous glands
C.	Chromatophores	D.	None of these