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The Nervous System of Cockroach

Eyes of Cockr...

Question

Eyes of Cockroach consist of visual units called

A

Osphradium

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B

Ostia

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C

Ommatidium

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D

Rhabdome

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Solution

The correct option is C Ommatidium
Eyes of Cockroach consist of visual units called Ommatidium.
Osphradium – olfactory organ in Mollusca
Ostia – apertures present in the heart of cockroach
Rhabdome – Retractive body in the eye of the cockroach.

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A) In a cockroach, the brain is represented by a supra-oesophageal ganglion that supplies nerves to the maxillary and labial palps.
B) The compound eyes are situated at the ventral surface of the head.
C) Each compound eye consists of 200 hexagonal ommatidia.

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