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I think its collar cells
Proprietary government failed because the proprietors failed to live up to their responsibilities,supplies were not sent,taxes were not collected, the port was in disrepair and tyhe governers were often incompetent and corrupt.
No, sea sponges are not decomposers. Sponges are filter feeders.
no sponges are not unicellular.
No, sponges are not parasitic.
no sponges do not have bones
Sponges are asymmetrical, although a few species have nearly radial symmetry.
Yes sponges have organs.
No. Sponges are animals, which are heterotrophic.
To answer your question no sponges do not hibernate
No sponges lack organized multicellular organs, such as nerves and muscles.
porifera are also called sponges some of the sponges are euplectelia spongilla and sycon