The mandible present in a cockroach is........

In both sexes of cockroach,a pair of jointed filamentous structures called anal cerci are present on

The terga,sterna and pleura of the cockroach body are joined by:

Statement $-A:$ $Periplaneta$ $americana$ is a nocturnal,omnivorous,and household pest.
Reason $-R:$ It acts as a scavenger.

Based on the position of the head,the cockroach is known as ..........

On an average,female $Periplaneta$ produces $.......$ oothecae,each containing $......$ eggs. Choose the correct option which fills the blanks respectively.