I thank Drs. K. F. Picardo and R. M. Miller for critical reading of the manuscript and the Biology Department at St. John Fisher College for insightful discussion, resources, and help. All monoclonal antibodies were obtained from the Developmental Studies Hybridoma Bank developed under the auspices of the National Institute of Child Health and Human Development and maintained by Department of Biological Sciences, The University of Iowa (Iowa City, IA). All C. elegans strains were obtained from the Caenorhabditis Genetics Center developed under the auspices the National Center for Research Resources and maintained at the University of Minnesota (Twin Cities, MN).