| − | Chemicals that affect the rate of cellular reproduction and the development of cells.<ref>Wile, Dr. Jay L. ''Exploring Creation With Biology''. Apologia Educational Ministries, Inc. 1998</ref> | + | [[Chemical|Chemicals]] that affect the rate of cellular reproduction and the development of [[cell|cells]].<ref>Wile, Dr. Jay L. ''Exploring Creation With Biology''. Apologia Educational Ministries, Inc. 1998</ref> |