A) 8 and 9th sterna
B) 7th sternum
C) 8th sternum
D) 9th sternum
Correct Answer: D
Solution :
Genital pouch of male cockroach lies at the hind end of abdomen bounded dorsally by 9th and 10th terga and ventrally by 9th sternum. Phallic organs or gonapophyses surround the male genital pore. The phallic organs consist of 3 small irregular chitinous plate known as phallomeres. Right phallomere : It consists of two horizontal opposing plates, a sickle-shaped hook and a serrated lobe terminating in two prongs. Left phallomere : It is made of a broad base from which arise 4 lobes of sclerites. Outer most is the short pseudopenis with a broad hammer-like head. To its left is a long, slender titillator with a curved hook. Innermost is the accutobols with a large curved hook. Outer to this is the serrated asperate. Opening of phallic gland lies between acutobolus and asperate lobes. Ventral phallomere : It is simple, broad and brown plate without lobes and lying beneath the right phallomere. Opening of ejaculatory duct lies at its base in an intromittent muscular region, called phallus or edeugus.
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