Read the following statements regarding the anatomy of cockroaches: I. In male cockroaches, the genital pouch is bounded dorsally by the 9^ th and 10^ th terga and ventrally by the 9^ th sternum. II. In female cockroaches, the 7^ th , 8^ th and 9^ th sterna together form a brood or genital pouch. III. The mushroom gland is a characteristic feature of the female reproductive system. IV. The phallic gland is present in

Step-by-step solution

Statement I is correct: In males, the genital pouch or chamber lies at the hind end of the abdomen bounded dorsally by the 9^ th and 10^ th terga and ventrally by the 9^ th sternum. Statement II is correct: In females, the 7^ th sternum is boat-shaped and together with the 8^ th and 9^ th sterna forms a brood or genital pouch. Statement III is incorrect: The mushroom gland is a characteristic feature of the male reproductive system, located in the 6^ th - 7^ th abdominal segments. Statement IV is correct: The phall