Question

Male and female cockroaches can be distinguished externally by

• A. Anal styles in male
• B. Anal cerci in female
• C. Anal style and antennae in female
• D. Both B and C

Answer 1

Answer: (A)

Anal styles in male

In males, genital pouch lies at the hind end of abdomen bounded by 8th and 9th terga and ventrally by 9th sternum. It contains dorsal anus ventral male genital pore and gonapophysis. Males bear a pair of short, thread-like anal styles which are absent in females.

So the correct answer is 'Anal styles in male'.