Which Result Did Hans Spemann and Hilde Mangold, Working with Amphibian

Multiple Choice

Which result did Hans Spemann and Hilde Mangold, working with amphibian embryos, obtain?

A) Tissue transplanted between late gastrulas developed into tissue appropriate for the location in which it was placed.
B) Each nucleus of cells in the blastula was specific in the development it could direct.
C) When the gray crescent was bisected, neither half of the zygote developed into an embryo.
D) Transplantation of the dorsal lip of the blastopore from an early gastrula onto the region opposite the blastopore of another early gastrula resulted in a single embryo with two notochords.
E) When the gray crescent was not bisected, the half of the zygote receiving it developed into a complete embryo while the half lacking it formed a clump of undifferentiated cells.