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23 October, 19:43

Explain what an exoskeleton is and what it is made of.

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  1. 23 October, 23:15
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    The bodies of arthropods are supported, not by internal bones, but by a hardened exoskeleton made of chitin, a substance produced by many non-arthropods as well. In arthropods, the nonliving exoskeleton is like a form-fitting suit of armor. It is produced by the "skin" and then hardens into a protective outer-covering.
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