cockroach is dioecius.explain.rn
Your friend is correct,
Cockroaches are dioecious. Both sexes have well-developed reproductive organs
Male Reproductive System
- A pair of testes; one each on the lateral side of the 4th, 5th and 6th abdominal segments
- Vas deferens arises from each testis.
- Vas deferens opens into the ejaculatory duct through the seminal vesicle.
- Ejaculatory duct opens into the male gonophores.
- A characteristic accessory reproductive gland (mushroom-shaped) is present in the 6th to 7th abdominal segments.
- The male gonapophysis represents the external genitalia.
- Sperms are stored in the seminal vesicles; glued together in bundles called spermatophores and discharged during copulation
Female Reproductive System
- Two large ovaries − formed by a group of 8 ovarioles; contain chains of developing ova
- Ovary lies laterally in the 2nd to 6th abdominal segments.
- Oviducts of each ovary unite into a single median oviduct (vagina).
- Vagina opens into the genital chamber.
- A pair of spermathecae is present in the 6th segment.
- Sperms are transferred through spermatophores.
- Fertilised egg is encased in capsules called oothecae (Dark brown in colour)
- Female produces 9−10 oothecae with 14−16 eggs.
- Development is paurometabolous (means passing through nymphal stage). Nymps look like adults and grow up to 13 times by moulting.
cockroaches are dioecious and both sexes have well developed reproductive oragns. Sperms are transferred through spermatophores. their fertilised eggs are encased in capsules called oothecae. Ootheca is a dark reddish to blackish brown capsule, about 3/8" (8mm) long. They are dropped or glued toa suitable surface, usually ina crack or crevice of high relative humidity near a food source. On an average female produce 9-10 oothecae, each containing 14-16 eggs