Sense organs of cockroach include

1. Compound eyes

2. Johnston's organ

3. Osphradium

4. Spiracles

Which one of the following is the true description of an animal concerned?

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

In frogs, cloaca receives

1. Faecal matter

2. Gametes

3. Unine

4. All of these

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

Exoskeleton of each segment in cockroach consists 

1. Dorsal tergum and a ventral sternum

2. Dorsal sternum and a ventral tergum

3. Sternum only

4. Tergum only

Alary muscles play an important role in

1. Circulation of blood

2. Respiration

3. Body movement

4. Peristalsis

Which of the following is incorrect statement with respect to cockroach?

1. The nymph grows by moulting about 13 times to reach the adult form

2. The outermost covering of spermatophore is formed by secretions of spermatheca

3. Mushroom glands are accessory reproductive glands in a male

4. Each compound eye consists of nearly 2000 ommatidia

Choose the incorrect statement with respect to cockroach