Which of the following is characteristic feature of cockroach regarding sexual dimorphism?
- Presence of anal styles
- Presence of sclerites
- Presence of anal cerci
- Dark brown body colour and anal cerci
Answer
(1) Presence of anal styles
Solution
A pair of short, thread-like anal styles is present only in male cockroaches, so it distinguishes the two sexes.
Sclerites, anal cerci and dark brown body colour are present in both sexes.
Answer: (1)