Externally,male and female cockroaches can be | vedclass

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(A) In cockroaches,sexual dimorphism is present. Male cockroaches can be distinguished from females by the presence of a pair of short,thread-like ana

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Anal styles in males

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(A) In cockroaches,sexual dimorphism is present. Male cockroaches can be distinguished from females by the presence of a pair of short,thread-like anal styles on the $9^{th}$ sternum. Anal cerci are present in both males and females on the $10^{th}$ segment. Therefore,the presence of anal styles in males is the primary external feature used to distinguish them from females.

Externally,male and female cockroaches can be distinguished by ............ .

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