A diploblastic animal is characterized by the presence of which of the following?
AEctoderm and endoderm only, with mesoglea between them
BEctoderm, mesoderm and endoderm, with a true coelom
CMesoderm and endoderm only, with no ectoderm
DOnly a single undifferentiated cell layer
Answer & Solution
Correct answer: A. Ectoderm and endoderm only, with mesoglea between them
Diploblastic animals possess two germ layers: ectoderm and endoderm. Between them lies a non-cellular, jelly-like mesoglea, as seen in coelenterates and ctenophores.
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