The figure given below shows the head region of a cockroach. Identify $A$ to $F$.

In female cockroach,the $7^{th}$ sternum is $:-$

Which of the following statement$(s)$ is/are correct regarding cockroaches?
$(i)$ The body of the cockroach is segmented and divisible into three distinct regions - head,thorax and abdomen.
$(ii)$ Blood vascular system is of closed type.
$(iii)$ They are monoecious and both sexes have well developed reproductive organs.
$(iv)$ The development of $P. americana$ is paurometabolous,meaning there is development through nymphal stage.

Mouth parts of a butterfly are of which type?

Describe the external body structure of a cockroach.

The number of segments in the appendages of a cockroach is .....