Which of the following features is not present in the Phylum Arthropoda?

Cephalothorax is found in the

Biramous appendages are typically found in

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?

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

The identifying feature of an insect is .....