which of the following characteristics is incorrect with respect to cockroach

Options

A. Hypopharynx lies within the cavity enclosed by the mouth parts
B. In females, `7^(th) - 9^(th)` sterna together form a genital pouch
C. `10^(th)` abdominal segment in both sexes, bears a pair of anal cerci
D. A ring of gastric caeca is present at the junction of midgut and hindgut

Answer

D

Explanation

* A ring of 6-8 blind tubules called hepatic or gastric caeca is present at the junction of foregut and midgut, which secrete digestive juice. And at the junction of midgut and hindgut, malpighian tubules are present.
* Hypopharynx lies within the cavity enclosed by mouth parts.
In female cockroach, the `7^(th)` sternum is boat shaped and together with the `8^(th) and 9^(th)` sterna forms a genital pouch.
* `10^(th)` abdominal segment in both sexes, bears a pair of anal cerci and `9^(th)` sternum only in male cockroach, bears a pair of chitinous anal style.