Which of the following is characteristic feature of cockroach regarding sexual dimorphism?

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Presence of anal styles

Presence of sclerites

Dark brown body colour and anal cerci

Presence of anal cerci

answer is C.

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Detailed Solution

Sexual dimorphism refers to the differences in morphological characteristics between males and females of a species. Anal styles are present in male cockroach only. We can differentiate male and female
cockroaches based on the presence or absence of anal styles.
(1) Anal cerci are found in both male and female cockroaches.
(2) Dark coloured body and anal cerci are found in both male and female cockroaches.
(4) Sclerites are the chitinous plates (tergites, sternites and pleurites) on the body surface of insects. They are found in both male and female cockroaches.

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