A) Nematodes
B) Platyhelminthes
C) Some arthropods
D) Both (a) and (b)
Correct Answer: B
Solution :
From flatworm to mammales, gastrulla have three germ layers, ecto, meso and endoderm, but coelom is absent in platyhelminthes, So these are acoelomate.You need to login to perform this action.
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