Why porifera include in kingdom parazoa
Answers
Answer:
The Parazoa, are a proposed clade of animals. Traditionally, Parazoa, literally translated as "beside the animals", only consisted of Porifera and the Placozoa. It still is a basal animal group, but has been refuted in the original sense (i.e. as sister of the Eumetazoa). It now appears the Planulozoa/Eumetazoa actually are sister of the Placozoa, together forming the ParaHoxozoa/Epitheliozoa clade.[1][2][3][4][5][6][7][8] With a cladistical inclusion of the Eumetazoa, Parazoa consists of the Porifera and the ParaHoxozoa/Epitheliozoa clade.[9] This is not currently considered, and parazoa is rather considered invalid, rather placozoa is typically excluded, leaving only Porifera.
The parazoa comes under the porifera.
EXPLANATION:
The subkingdom parazoa are the sponges. These are multicellular organism with minute specialised cells, they come under single phylum porifera. Sponges are only animal with mass number of cells embedded in gelatinous matrix.
This distinct features makes it unique and different from other animal whose embryo have two or three germ that generate the true tissuse. There are '500 species' with '150' belonging to fresh water. Ground sponges regenerate reproduce from broken species.