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Q.

Which of the following is not the mouthpart of cockroach?

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a

Labrum

b

Ocellus

c

Maxillae

d

Mandibles

answer is B.

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Detailed Solution

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The mouthparts of Periplaneta are of biting and chewing type and include of a labrum (upper lip), labium (lower lip), a pair of mandibles, a pair of first maxillae and a hypopharynx.

The ocelli are the type of photoreceptors that are present in the cockroaches.

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Which of the following is not the mouthpart of cockroach?