Write a short note on exoskeleton of cockroach.

1. Pitch refers to the sharpness or shrillness of sound. 2. Increase in frequency of sound results in increase in the pitch and the sound is said to be sharper. 3. Tone...

i. Timbre of a sound refers to the quality of the sound which depends upon the mixture of tones and overtones in the sound. Same sound played on different musical...

D) both a, b correc

1. Cockroach has a body cavity or true coelom present around the viscera.  2. The body cavity of cockroach is known as haemocoel as it is filled with haemolymph (blood). Cockroaches...

Spiracles: They are paired respiratory openings. Spiracles are present on the ventrolateral side of the body, in pleural membrane. Cockroaches have two pairs of thoracic and eight pairs of abdominal...

Peripheral nervous system (PNS):  1. The peripheral nervous system comprises of nerves that arise from various ganglia of CNS.  2. Six pairs of nerves arise from the supraoesophageal ganglia.They supply to the...

(B) Presence of caudal styles

The supportive structures present inside the body form the endoskeleton and when the supportive structures are present on the outer surface of the body they form exoskeleton.

C) Desert ecosystem

Correct Answer - Amphibia