Practice Questions

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#Question id: 5122

In amphibia, when epidermal (ectodermal) and mesodermal cells are brought together in a mixed aggregate, the epidermal cells move to the periphery of the aggregate, and the mesodermal cells move to the inside by the process of selective affinity. Which of the following statement describe the phenomena of selective affinity?

#SCPH01 Biochemistry

The inner surface of the ectoderm has a positive affinity for mesodermal cells and a negative affinity for the endoderm, whereas the mesoderm has positive affinities for both ectodermal and endodermal cells.
The inner surface of the ectoderm has a negative affinity for mesodermal cells and a positive affinity for the endoderm, whereas the mesoderm has negative affinities for both ectodermal and endodermal cells.
The inner surface of the ectoderm has a positive affinity for mesodermal cells and a positive affinity for the endoderm, whereas the mesoderm has positive affinities for both ectodermal and endodermal cells.
The inner surface of the ectoderm has a negative affinity for mesodermal cells and a negative affinity for the endoderm, whereas the mesoderm has negative affinities for both ectodermal and endodermal cells