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

question 65

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

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