Which of the following is incorrect statement about frog?

1. Body is divisible into head and trunk

2. The skin is moist without scales

3. A tympanum represents the ear

4. Fore limbs have four digits with webs and hind limbs have five digits without webs

The biological adaptation that allows frogs to obtain water for their survival during conditions of water scarcity is the

1. presence of a modified tongue that acts like a sponge to suck water from damp soils.

2. presence of water channels in the skin by which they absorb water from their surroundings.

3. presence of ciliated esophagus that helps in separating water from ingested particulate matter.

4. selective feeding on plants with a large amount of water that would fulfill the water requirement.

Mucus helps a frog in forming

1. Thick skin

2. Dry skin

3. Smooth skin

4. Moist skin

Regarding skin of the frog, incorrect statement is:

1. It is made of the epidermis and the dermis

2. Mucous glands are present in the dermis and open at the surface

3. It is soft, moist and slimy

4. It is covered by scales

Forelimbs of frog have:

1. Five digits

2. Four digits

3. Three fingers

4. One finger