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Biology 12 Online
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

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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