write some features of porifera
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they bear pores called as ostia
they posses water transport system
they posses water transport system
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Some features of Porifera are:-
→They are called as sponges.
→They have holes all over the body called Ostia and a large opening at the top.
→Body is made up of single layered cells.
→External skeleton is present.
→Canal system is there for circulating water through the body.
→The body design involves very little differentiation and division.
→These animals don't move ,they stay attached to a support.
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