Cockroach is included in the ............ phylum.

Which phylum is the largest phylum of the animal kingdom?

Haemocyanin is found in

Which one of the following features is possessed by crustaceans and not by insects?

$A$: Chitinous exoskeleton is a characteristic feature of arthropods.
$R$: It allows diffusion of water vapour from atmosphere to the body.

In many arthropods,the head and thorax are fused to form a cephalothorax. However,in which of the following classes of animals is the body divided into head,thorax,and abdomen?