Which of the following characteristics is incorrect with respect to cockroach?
A ring of gastric caeca is present at the junction of midgut and hind gut
Hypopharynx lies within the cavity enclosed by the mouth parts
In females, 7th-9th sterna together form a genital pouch
10th abdominal segment in both sexes, bears a pair of anal cerci
Option (1) is incorrect because a ring of gastric caecae is present at the junction of foregut and midgut. At the junction of midgut and hindgut, malpighian tubules are present. Hypopharynx lies within the cavity enclosed by mouthparts. In female cockroach, the 7th sternum is boat shaped and together with the 8th and 9th sterna forms a genital pouch. 10th abdominal segment in both sexes, bears a pair of anal cerci and 9th sternum only in male cockroach, bears a pair of chitinous anal style.
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