Choose the incorrect statement with respect to cockroach

1. Haemocoel contains haemolymph which contains colourless plasma and haemocytes

2. Nervous system consists of segmentally arranged ganglia, six in thorax and nine in abdomen

3. Mushroom gland is present in 6th – 7th abdominal segment in male cockroach

4. Proventriculus has an outer layer of thick circular muscles and inner thick cuticle forming teeth

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

Which of the following does not behave as a sense organ in cockroach?

1. Maxillary palps

2. Labial palps

3. Anal cerci

4. Phallomeres

Choose the incorrect match with respect to total number of following structures in cockroach

1. Spiracles – 10 pairs

2. Gastric caeca – 6-8

3. Malpighian tubules – 100-150

4. Ommatidia – 2000

Secretions from these help in digestion of food in cockroach. ‘These’ represents the

(1) Crop

(2) Gizzard

(3) Hepatic caeca

(4) Malpighian tubules

Select the correct statement with respect to Periplaneta americana.

1. Paurometabolous development with 9-10 nymphal stages.

2. A pair of spermatheca is present in the 6th segment of only female cockroach.

3. Anal styles present exclusively in males are attached to 10th tergite.

4. Mesothoracic wings are opaque, dark and leathery in appearance and are used in flight.

Which of the following statements is true for cockroaches?

1. The total number of ovarioles are five in both ovaries

2. The larval stage is called naiad

3. Anal styles are absent in females

4. They are ureotelic

Alary muscles play an important role in

1. Circulation of blood

2. Respiration

3. Body movement

4. Peristalsis

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

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