Final answer:
Excessive dorsal BMP leads to dorsalization, resulting in incorrect positioning of the dorsal-ventral and lateral-medial sides and incomplete differentiation of cell layers.
Step-by-step explanation:
Excessive dorsal BMP (Bone Morphogenetic Protein) leads to dorsalization in an animal. This means that the animal will have incorrect positioning of the dorsal-ventral and lateral-medial sides, and differentiation of cell layers will be incomplete. In other words, the animal will lack an anterior-posterior or dorsal-ventral side and may not have complete differentiation of cell layers.