What is the defining characteristic of Phylum Porifera ?
-stinging cells
-Pores/Pore bearing
-comb rows
-Triploblastic

Pores/Pore Bearing

Explanation:

Poriferans are commonly called sponges. These are multicellular organisms which are sessile/sedentary in nature. Most of them are marine while a few are fresh water forms. Body is cylindrical, asymmetrical or has radial symmetry.

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