Chapter 1Defending the Zygote: Search for the Ancestral Animal Block to PolyspermyJulian L. Wong, Gary M. WesselChapter 2Dishevelled: A Mobile Scaffold Catalyzing DevelopmentCraig C. Malbon, Hsien-yu WangChapter 3Sensory Organs – Making and Breaking the Pre-Placodal RegionAndrew P. Bailey, Andrea StreitChapter 4Regulation of Hepatocyte Cell Cycle Progression and Differentiation by Type I Collagen StructureLinda K. Hansen, Joshua Wilhelm, John T. FassettChapter 5Engineering stem cells into organs: Topobiological Transformations Demonstrated by Beak, Feather and Other Ectodermal Organ MorphogenesisCheng-Ming Chuong, Ping Wu, Maksim Plikus, Ting-Xin Jiang, Randall Bruce Widelitz Chapter 6Fur Seal Adaptations to Lactation – Insights into Mammary Gland FunctionJulie A. Sharp, Kylie N. Cane, Christophe Lefevre, John P.Y. Arnould and Kevin R. Nicholas