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Solution


Q.

Which of the following is a characteristic feature of cockroach regarding sexual dimorphism                [2023]
1 Presence of sclerites  
2 Presence of anal cerci  
3 Dark brown body colour and anal cerci  
4 Presence of anal styles  

Ans.

(4)

Cockroach shows sexual dimorphism, i.e., the sex can be distinguished from each other externally. Male cockroach bears a pair of short, thread-like anal styles which are absent in females. Dark brown body colour, anal cerci and sclerites are present in both male and female cockroaches.