Which of the following act(s) as a respiratory organ in a frog on land?

1. Skin 

2. Buccal cavity

3. Lungs

4. All of the above

The cells of epithelial tissues are _______ packed with _________ intercellular matrix.

1. Loosely, little

2. Loosely, large

3. Compactly, little

4. Tightly, large 

Forelimbs of frog have:

1. Five digits

2. Four digits

3. Three fingers

4. One finger

Bull frog of India is

(1) Rana tigerina

(2) Rana sylvatica

(3) Rana ecutedbeiana

(4) Rana esculenta

The outermost layer of the skin of the frog is made of:

1. Stratified squamous keratinized epithelium

2. Stratified squamous non keratinized epithelium

3. Simple squamous cpithelium

4. Simple columnar epithelium

Regarding feeding habits:

1. Tadpole is herbivorous and frog is carnivorous

2. Tadpole is carnivorous and frog is herbivorous

3. Both tadpole and frog are carnivorous

4. Both tadpole and frog are herbivorous

Frogs are amphibians in the order

1. Apoda

2. Urodela

3. Anura

4. None of the above

Regarding frog:

I. They undergo aestivation and hibernation

II. They are carnivorous

III. They are poikilotherms

1. I, II, III are correct

2. I and II are correct

3. I and III are correct

4. II and III are correct

Gas exchange between the air and blood stream occurs in three locations in the frog:

(1) the skin
(2) the lining of the mouth
(3) the lungs

1. (1) and (2)
2. (1) and (3)
3. (2) and (3)
4. (1), (2) and (3)

Regarding respiration in frogs:

I. The skin of a frog is permeable to oxygen and carbon dioxide, as well as to water.
II. When a frog is underwater, oxygen is transmitted through the skin directly into the bloodstream.
III. On land, adult frogs use their lungs to breathe

The correct statements are:

1. I, II, III
2. I and II
3. I and III
4. II and III