| − | [[Animal]] [[tissue]] consisting of one or more layers of [[cell|cells]] that have only one free surface, because the other surface adheres to a [[membrane]] or other substance.<ref>Wile, Dr. Jay L. ''Exploring Creation With Biology''. Apologia Educational Ministries, Inc. 1998</ref> | + | [[Animal]] [[tissue]] consisting of one or more layers of [[cell]]s that have only one free surface, because the other surface adheres to a [[membrane]] or other substance.<ref>Wile, Dr. Jay L. ''Exploring Creation With Biology''. Apologia Educational Ministries, Inc. 1998</ref> |