5) To what extent do events occurring during regeneration re­ semble those seen in development? Thus, the principles of cell death, competition, selective retraction of specific processes, and the effects of abnormalities on the development of the rest of the system have now been extensively investigated.

Other: J.G. Nicholls
Contributions by: H.J. Anderson, J.W. Lichtman, M.E. Raichle, C.J. Shatz