Question

The diagram given below represents the reproductive organ of male cockroach. Choose the correct labelling of the part of marked as A, B, C and D.

• A. $A-8^{\text{th }}$ sternum, $B-$ Anal cercus, $C-10^{\text{th }}$ tergum, D - Anal style
• B. A - $10^{\text{th }}$ tergum, B - Anal cercus, C - Anal style, D $-8^{\text{th }}$ sternum
• C. A - Anal style, B - Anal cercus, $C-10^{\text{th }}$ tergum, D- $8^{\text{th }}$ sternum
• D. A-Anal cercus, B-8 th sternum, $C-10^{\text{th }}$ tergum, D - Anal style.

Answer 1

Answer: (A)

In the given structure of male reproductive system of cockroach, the label marked as A to D are respectively $8^{\text{th }}$ sternum; anal cercus; $10^{\text{th }}$ tergum and anal style.
Anal style is a pair of short, thread-like present in males. In both sexes, the $10^{th}$ segment bears of pair of jointed filamentous structures called anal cerci.