Question

The given figure is the reproductive system of a female cockroach. The correct labeling indicated by A, B, and C are respectively

a. A- Spermathecae, B- Collatherial glands, C- Tegmina
b. A- Spermathecae, B- Seminal vesicle, C- Gonaphyses
c. A- Phallic gland, B- Collateral glands, C- Gonapophyses
d. A- Spermathecae, B- Collateral glands, C- Gonapophyses

Answer 1

Hint: Cockroach is a dioecious insect having a well developed reproductive system. The female reproductive system in cockroaches consists of a pair of spermathecae and collateral glands that directly opens into the genital chamber.

Complete answer:
The correct labeling of the female reproductive system of cockroach can be depicted as-

Additional Information:
The female reproductive system in cockroaches consists mainly of ovaries, spermathecae, collateral glands, gonapophyses, and genital chambers.
Ovary- They possess two large ovaries lying laterally in the 2nd-6th abdominal segments. Each ovary is formed by a group of eight ovarian tubules or ovarioles. Ovaries open into an ovarian duct, which unites to form a single median ovarian duct that finally opens into the genital chamber as the vagina.
Spermathecae- They are paired pocket like structures present in the 6th segment of the female body. It is responsible for the receiving and storage of male gametes or the male component of the body in hermaphrodites.
Collateral glands- They are unequal, paired tubular glands that open in the dorsum of the genital chamber just above the spermathecal aperture. They secrete a secretion that covers the entire row of eggs during oviposition and forms the rigid oothecal case of the ootheca.
Gonapophysis or phallomeres are long, slender, paired organs that help in copulation and oviposition or stinging. They act as female genital structures and guide the ova into the ootheca as ovipositors.

So, the correct answer is A- Spermathecae, B- Collateral glands, C- Gonapophyses.

Note-
- The ootheca is a dark reddish to a blackish-brown capsule-like case that consists of fertilized eggs. They are dropped on a suitable place by the female cockroach from which new baby cockroaches hatch out.
- In male cockroaches also the external genitalia is termed as gonapophyses or phallomeres.
Spermathecae is also known as ‘receptaculum seminis'.