A) ectoderm and endoderm
B) ectoderm and mesoderm
C) mesoderm and endoderm
D) just below mesoderm
Correct Answer: A
Solution :
The coelenterates are diploblastic animals. They have two germ layers, the ectoderm and endoderm. Between these two layers, a thin, delicate, transparent and non-cellular mesogloea is present.
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