Many insects have a tough outer shell called _____.
an exoskeleton
cellulose
an endoskeleton
chitin
Many insects have a tough outer shell called an exoskeleton.
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Asked 1/14/2013 1:43:43 PM
Updated 5/30/2016 11:31:20 PM
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Andrew. [5/30/2016 11:31:19 PM], Confirmed by
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