Question

The given figure represents posterior region of male cockroach. Identify the parts labelled as A, B, C and D.

• A. A - $9^{th}$ sternum, B - Caudal style, C - ${10}^{th}$ tergum, D - Anal circus
• B. A - Caudal style, B - Anal circus, C - ${10}^{th}$ tergum, D - $9^{th}$ tergum
• C. A - $9^{th}$ tergum, B - Anal circus, C - ${10}^{th}$ tergum, D - Caudal style
• D. A - $9^{th}$ tergum, B - Anal circus, C - ${10}^{th}$ stemum, D - Caudal style

Answer 1

The correct option is C

A - $9^{th}$ tergum, B - Anal circus, C - ${10}^{th}$ tergum, D - Caudal style

Posterior region of male cockroach is given. Posterior means back of the body, in the cockroach's case, upper part of the body. Cockroaches have terga in the upper part and sternum and the lower or front of the body. So the segments in the diagram are the terga.

So A and C are the 9th and 10th terga respectively.