Internal fertilization is not seen in

1. Birds

2. Reptiles

3. Frog

4. Mammals

Select the incorrect match with respect to animals and the type of nitrogenous waste excreted by them

      Animals                                Nitrogenous waste
1. Rana                                  -  Uricotelic

2. Pheretima                           -  Ureotelic

3. Periplaneta                         -  Uricotelic

4. Tadpole larva of frog           -  Ammonotelic

In a frog, heart is enclosed within a two-layered sac called

1. Mesorchium

2. Pericardium

3. Pleura

4. Conus arteriosus

Frogs can protect itself from enemies by

1. Clawed toes

2. Spiny skin

3. Camouflage

4. Sharp teeth

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

In frog, oxygen dissolved in water can be taken by

1. External nares

2. Spiracles

3. Buccal cavity

4. Skin

A thin-walled, triangular chamber attached dorsally to heart of a frog is known as

1. Truncus arteriosus

2. Sinus venosus

3. Atrium

4. Ventricle

A specialised connective tissue containing chondrocytes can be found at/in

(1) Myocardium

(2) Blood vessels

(3) Tip of nose

(4) Tendons

Select the odd one with respect to secretions of exocrine glands.

1. Saliva

2. Mucus

3. Insulin

4. Milk

Skeletal muscle fibres are

1. Branched, spindle-shaped and uninucleated

2. Striped, multinucleated and unbranched

3. Unbranched, involuntary and cylindrical in shape

4. Voluntary, unbranched and uninucleated