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Select the correct statement about the cockroach.

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The haemolymph is composed of colourless plasma and haemocytes.

The entire gut is lined by a cuticle.

The nervous system of cockroach is mostly confined to the head.

The tracheae open through 10 pairs of small holes called the ostia.

answer is C.

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Detailed Solution

The haemolymph of cockroach is composed of colourless plasma and haemocytes. There is no respiratory pigment.

The midgut is not lined by a cuticle.

The tracheae open out through the spiracles (not ostia).

The head holds a bit of a nervous system while the rest is situated along the ventral part of its body.

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