Answer in one word or one line. How many segments are present in the abdomen of a cockroach?

In a cockroach,the plate located below the eyes that passes over the cranium is called the ...... .

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

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

Anal styles are found in which of the following?

Male and female cockroaches can be distinguished externally through: