What characteristic does not describe a vertebrate?

Name: What characteristic does not describe a vertebrate?
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Question

Quizplus · Accepted Answer

Vertebrates have backbones, which are internal skeletal structures made up of individual vertebrae. They also have either gills or lungs to breathe, a notochord in their embryonic stage, a posterior tail, and other defining characteristics. However, they do not have exoskeletons, which are external protective coverings found in many invertebrates such as insects, crustaceans, and arachnids.

What Characteristic Does Not Describe a Vertebrate