In the male cockroach,in which part of the reproductive system are the sperms stored?

In female cockroach,the $7^{th}$,$8^{th}$,and $9^{th}$ sterna form a genital pouch. Which of the following pairs of sterna are primarily involved in forming the brood or genital pouch?

Which is a characteristic of a cockroach?

The trachea in mammals and the trachea in cockroaches are similar in that they both have:

Housefly feeds on sugar by

In cockroaches,the excretory product is ........ .