Phylum Porifera (Sponges) General characteristics
This video is about phylum porifera. The topic has been taken from class 11 biology chapter 9 in pashto. The chapter name is diversity among animals.
Porifera are pore bearers. They are mostly marine and aquatic. Their body layer is diploblastic and the body is parazoic. It has no symmetry. The nutrition is holozoic and the reproduction is asexual and sexual. Their body has spongin and spicules which makes their body soft and hard.
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