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The substance that makes up the outer shell of insects.
A chemical that provides both toughness and flexibility.<ref>Wile, Dr. Jay L. ''Exploring Creation With Biology''. Apologia Educational Ministries, Inc. 1998</ref>
A chemical that provides both toughness and flexibility.<ref>Wile, Dr. Jay L. ''Exploring Creation With Biology''. Apologia Educational Ministries, Inc. 1998</ref>
==References==
==References==
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