The exoskeleton of arthropods is composed of $..................$.

'Hexapoda' is another name for which of the following classes?

In which of the following is an open circulatory system found?
$(1)$ Arthropoda $(2)$ Annelida $(3)$ Chordata

Presence of hepatopancreas is a characteristic of

The process of shedding the exoskeleton at regular intervals during growth and development in the phylum $Arthropoda$ is known as: ........

Swarming is found in