Changes

The substance that makes up the outer shell of insects.

'''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>

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>

==References==

==References==

<references/>

<references/>

[[Category:Biology]]

[[Category:Biochemistry]]

[[Category:Cellular Biology]]