Which of the following organisms possesses compound eyes consisting of ommatidia?

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

Describe the external body structure of a cockroach.

Which of the following statement$(s)$ is/are correct?
$(i)$ Cockroaches are brown or black bodied animals that are included in class $Insecta$ of phylum $Arthropoda$.
$(ii)$ Males bear a pair of short,thread-like anal styles which are absent in females.
$(iii)$ The heart of a cockroach consists of an elongated muscular tube lying along the mid-dorsal line of the thorax and abdomen.
$(iv)$ The nymph grows by moulting about $13$ times to reach the adult form.

Which one of the following does not occur in a cockroach leg?

Which external changes are observed after the final nymphal stage of a cockroach?