In frogs, cloaca receives

1. Faecal matter

2. Gametes

3. Unine

4. All of these

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

The central nervous system of cockroach includes

1. Brain and ganglionated dorsal nerve cord

2. Brain and ganglionated ventral nerve cord

3. Brain and hollow nerve cord

4. Dorsal solid nerve cord only

Sense organs of cockroach include

1. Compound eyes

2. Johnston's organ

3. Osphradium

4. Spiracles

Thin tubes that carry oxygen from the air to all the parts in cockroach constitute

1. Tracheal system

2. Haemolymph

3. Lungs

4. Gills

In cockroach, foregut comprises of

1. Pharynx, oesophagus, crop and gizzard

2. Mesenteron, crop and gizzard

3. lleum, colon and rectum

4. Pharynx, oesophagus and rectum