Experiments on Selective Adhesion Between Ectoderm, Mesoderm, and Endoderm Derived

Multiple Choice

Experiments on selective adhesion between ectoderm, mesoderm, and endoderm derived from amphibian embryos demonstrated that ____.

A) ectoderm cells have positive affinity for mesoderm cells, but negative affinity for endoderm cells
B) ectoderm cells have negative affinity for mesoderm cells, but positive affinity for endoderm cells
C) mesoderm cells have negative affinity for endoderm and ectoderm cells
D) ectoderm cells have positive affinity for both endoderm and mesoderm cells
E) endoderm cells have positive affinity for both ectoderm and mesoderm cells