What is the basis of classification of phylum porifera

1.	What is the basis of classification of phylum porifera
Answer» PHYLUM PORIFERA\tMembers of this phylum are commonly known as sponges.\tWaterenters in the body of sponges through minute pores (ostia) in the body wall into a central cavity,\xa0spongocoel, from where it goes out through the\tChoanocytes\xa0or collar cells line the spongocoel and the canals.\tDigestion is intracellular, skeleton made up of spicules or spongin fibres, they are hermaphrodites.\tSponges reproduce asexually by fragmentation and sexually by formation of gametes, fertilization is internal and development is indirect.Examples-\xa0Sycon\xa0(Scypha),\xa0Spongilla (Fresh water sponge)

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