📝 Multiple Choice Question
General-science
Which of the following does NOT belong to the category of Porifera?
A
Hydra
B
Sycon
C
Spongilla
D
Euplectella
Explanation
Hydra biologically belongs to the phylum Cnidaria, not Porifera, because it firmly exhibits specialized tissue levels of organization and radial symmetry unlike typical primitive sponges.
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