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OpenStudy (anonymous):
Check? Which of the following is a characteristic of vertebrates? a hard exoskeleton made of chitin a hard outer shell <--- stinging cells an inner skeleton made of bone or cartilage
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OpenStudy (anonymous):
It is the last choice because we are vertebrates and do not have a hard exoskeleton, a hard outer shell or stinging cells, but we do have an inner skeleton.
OpenStudy (dqswag):
amniotic eggs *Cough Medal!! :D
OpenStudy (anonymous):
amniotic eggs is not a choice on the list
OpenStudy (anonymous):
@dqswag Amniotic eggs? Okay.... @KatieMTB Thanks!!
OpenStudy (dqswag):
Welcome
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