Question

On the head region of Cockroach _______ of _______. and _______ shaped eyes occur.

• A. One pair, senssile compound and kidney shaped
• B. Two pairs, stalked compound and round shaped
• C. Many pairs, senssile simple and kidney shaped
• D. Many pairs, stalked compound and kidney shaped

Answer 1

The correct option is A One pair, senssile compound and kidney shaped

Cockroach bears several types of receptor organs likes other insects to perceive different types stimuli like touch, smell, taste, sound, change in temperature and light. From these all, except the receptors for light—the photoreceptors, i.e., eyes, are found situated in the epidermis of the integument and in fact they are modified epidermal cells called sensillae.
They usually have compound eyes. The compound eyes of cockroach are a pair of large, sessile, black, kidney-shaped structures situated at the dorsolateral sides of the head capsule. It is a complicated structure and covered externally by the cuticle which is transparent. The transparent cuticle covering the compound eyes is divided into a large number of hexagonal compartments (2000 in cockroach) called corneal facets.