The neural crest is "perhaps the most important innovation in the origin of the vertebrate body plan." It is the name for the structure that forms during the process of neurulation, when the neural plate folds into the neural tube (what is ultimately the "dorsal, hollow nerve cord" of chordates). After the neural tube is formed, these cells detach from the epidermis and migrate to other locations.
Which clades below have migratory neural crest cells present in all (or at least some) of its taxa?
A. Cephalochordata
B. Urochordata
C. Vertebrata
D. None of the above
