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11.

Laryngotracheal chamber in frog is supported by:

A.	One pair arytenoids cartilages	B.	One pair cricoid cartilages
C.	Both of these pairs of cartilages	D.	None of these cartilages

12.

Glottis is opened and closed in frog by:

A.	Arytenoids with the help of certain muscles	B.	Cricoids with the help of certain muscles
C.	Both of these cartilages with the help of certain muscles	D.	None of these

13.

In the frog the sound is also produced by the female, it is called:

A.	Croaking	B.	Squeak
C.	Chirp	D.	None of these

14.

Loud sound in male frog is due to the fact that:

A.	Vocal cords are better developed in frog	B.	Vocal cords works as resonators
C.	Vocal sacs works as resonators when filled with air	D.	Males have two pair of vocal cords

15.

A frog can produce sound enen under water because:

A.	Its external nares are generally closed	B.	Its vocal sacs are covered with protective skin
C.	It has buccopharyngeal cavity	D.	Its vocal sacs do not open outside

16.

During inspiration the external nares in frog are closed by:

A.	Contraction of stemohyals	B.	Contraction of pterohyals
C.	Contraction of submental muscles which raises mentomec kelian bones which in turn raise prearillae	D.	Some method other than these

17.

During hibernation, frog respires by:

A.	External gills	B.	Lungs and buccopharyngeal cavity
C.	External gills and lungs	D.	Moist skin

18.

A frog lust swallow air if lungs are to by expanded because frog:

A.	Has no diaphragm	B.	Normally breathes through skin
C.	Has no vagus nerve	D.	is relatively low form of life

19.

Which of the following structures in not related with respiration in frog:

A.	Diaphragm	B.	Lungs
C.	Skin	D.	Buccopharyngeal

20.

In frog respiration occurs by:

A.	Lungs	B.	Tracheae
C.	Gills only	D.	All of these