Q.
An undifferentiated layer, mesoglea, is present in
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NTA AbhyasNTA Abhyas 2020Animal Kingdom
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Solution:
Animals in which the cells are arranged in two embryonic layers, external ectoderm, and internal endoderm, are called diploblastic animals, e.g., coelenterates. An undifferentiated layer, mesoglea, is present in between the ectoderm and the endoderm.