I. In cockroach, each testis extend from 4^thto 6^th__________ segment.
II. Each compound eye in cockroach consists of about ____________ hexagonal ommatidia.

Select the correct option.

Question

I. In cockroach, each testis extend from 4 th to 6 th __________ segment. II. Each compound eye in cockroach consists of about ____________ hexagonal ommatidia. Select the correct option.

TestHub · Accepted Answer

Testis (1 pair): Each testis extends from the 4th to 6th abdominal segment in the cockroach.

The compound eyes in cockroach are situated at the dorsal surface of its head. Each eye possesses approximately 2000 hexagonal ommatidia. With the help of several ommatidia, a cockroach can receive several images of an object. This kind of vision is known as a mosaic vision with more sensitivity but less resolution, being common during the night (hence called nocturnal vision).

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