Q.The head region of Cockroach ____ pairs of ____ and ____ shaped eyes occur.

Periplaneta americana (Phylum Arthropoda, Class Insecta, Order Orthoptera) is a cosmopolitan, nocturnal, omnivorous insect with a dorso-ventrally flattened, chitin-armoured body divided into head, thorax and abdomen. The exoskeleton is built of hardened sclerites (dorsal tergites, ventral sternites, lateral pleurites) joined by flexible arthrodial membrane. The head is hypognathous (mouthparts point downward), bearing large kidney-shaped compound eyes, antennae and biting-chewing mouthparts; the three-segmented thorax carries six walking legs (hexapod) and two pairs of wings (leathery tegmina over membranous flight wings); the ten-segmented abdo …