write any two characteristics of phylum poriferans
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Characters of phylum porifera are as follows :
1.There is pores present on their body.
2.They are substratum.
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Characteristics of Phylum Porifera :
>> Animals belonging to phylum Porifera have porous body.
>> They are solitary or colonial, mostly living in marine waters. They are attached to some substratum and hence called sedentary.
>> Body is cylindrical, vase-shaped having cell upgrade organization. A central space called spongocoel is present within the body.
>> Endoskeleton of spicules is a characteristic feature of Porifera. Spicules are made up of calcium carbonate or silica. Proteinaceous spongin fibres are present.
>> Examples of Porifera are sponges such as Sycon, Euspongia, Spongilla, etc.
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