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'''Chitin''' is the substance that makes up the outer shell of [[insect]]s, and is also found in the [[cell wall]] of [[fungi]] <ref>Morphology of the fungi [http://www.ucmp.berkeley.edu/fungi/fungimm.html]</ref>
'''Chitin''' is the substance that makes up the outer shell of [[insect]]s, and is also found in the [[cell wall]] of [[fungi]] <ref>[http://www.ucmp.berkeley.edu/fungi/fungimm.html Morphology of the fungi]</ref>
It is a chemical that provides both toughness and flexibility.<ref>Wile, Dr. Jay L. ''Exploring Creation With Biology''. Apologia Educational Ministries, Inc. 1998</ref>
It is a chemical that provides both toughness and flexibility.<ref>Wile, Dr. Jay L. ''Exploring Creation With Biology''. Apologia Educational Ministries, Inc. 1998</ref>