Question

what is prorifera and cell

Answer 1

Poriffera is the class which descibes the plants with soft irregular body, with ostia and with osculum
Cell is defined as the structural and functional unit of living organism

Answer 2

Choanocytes are versatile cells. Their flagella beat to create the active pumping of water through the sponge, while the collars of the choanocytes are the primary areas that nutrients are absorbed into the sponge. Furthermore, in some sponges the choanoflagellates develop into gametes.