Biology, asked by hotshot2404, 1 year ago

There skeleton is made up of calcareous plates or spicules of phylum

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Answered by shraddha7255

phylum echinodermata

Answered by KINGHARSHAD

As a whole, poriferans have diverseskeletal elements including calcareouslaminae, organic filaments, and siliceous and calcareous spicules. ... Some spicules are formed of the mineralized substances calcium carbonate and silica, while others aremade of an organic substance called spongin.

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