Structural Orga...

The structure in earthworm which serves as a wedge to force open cracks in the soil is

How many spiracles are present in the thorax of cockroach

The body cells in Cockroach discharge their nitrogenous waste in haemolymph mainly in the form of

In Cockroach, the arthrodial membrane

If a live earthworm is pricked with a needle on its outer surface without damaging its gut, the fluid that comes out is

The first body segment of earthworm is 

In Earthworm, gizzard is present in segments

Metanephridia of Earthworm are ____________.

Role of calciferous glands in stomach of earthworm is to

Identify the correct statements with reference to nervous system of Periplaneta

(i) Brain is mainly sensory and an endocrine gland
(ii) All thoracic ganglia supply nerves to the parts of their respective segments only
(iii) Sixth abdominal ganglion is the largest of all abdominal ganglia
(iv) Frontal ganglion is connected to ingluvial ganglion by a recurrent nerve