While studying the morphology of a cockroach, you observe a pair of jointed, filamentous appendages projecting from the 10^ th abdominal segment in both male and female specimens. These structures are known as:

Step-by-step solution

In both male and female cockroaches, the 10^ th abdominal segment bears a pair of jointed filamentous structures called anal cerci. Anal styles are unjointed, thread-like structures found only in males (arising from the 9^ th sternite). Gonapophyses and phallomeres are structures associated with the external genitalia, not the jointed appendages of the 10^ th segment. Answer: Anal cerci