They have backbones.
No, sea sponges do not have an exoskeleton. Instead, they have a porous body structure supported by a skeleton made of silica or calcium carbonate spicules, or a protein called spongin. This unique composition allows sponges to maintain their shape while remaining flexible and adaptable to their environments.
Worms are multicellular organisms belonging to the animal kingdom, while sponges are multicellular organisms belonging to the animal phylum Porifera. Worms have bilateral symmetry and a digestive system, while sponges lack symmetry and have a porous body structure supported by spicules or spongin fibers.
No, sea sponges are not decomposers. Sponges are filter feeders.
no sponges are not unicellular.
no sponges do not have bones
No, sponges are not parasitic.
Sponges are asymmetrical, although a few species have nearly radial symmetry.
To answer your question no sponges do not hibernate
Yes sponges have organs.
No. Sponges are animals, which are heterotrophic.
No sponges lack organized multicellular organs, such as nerves and muscles.
If you're talking about kitchen sponges, they do not have cells. However, sea sponges have cells.