Question

Sponges are porifera because their bodies have
A. Spicules in skeleton
B. Several pores
C. Canal system
D. All the above

Answer 1

Hint: Basically it belongs to the member of the phylum porifera. It is something like multicellular organisms and its body is full of spores and also it allows the water to circulate through them. Its appearance looks like a jelly-like structure between two thin layers of cells.

Complete answer: This Sponges belongs to phylum porifera and this word porifera comes from the Latin word which means pores. The sponges have a porous body. The body has many inhalant pores called ostia, and secondary an exhalant pores called osculum. In this the water enters through the ostia and then leaves through the osculum.
Now let’s see the scientific classification, it's kingdom of Animalia, its phylum is porifera, its species name is Amphimedon queenlandica, its classes are calcarea, hexactinellida. Sponges have a canal system in their body to transport water through that minute pores in the body, so that means the sponges have canal system in their body that serves the food collection and respiration and also sponges have spicules in skeleton in their body that provides structural support and defense against the predators.
In the outer walls of the sponges it has a tiny pores through which water is drawn. Cells in the sponge walls filter food from the water so that the water is pumped through the body and out through larger openings.

Hence, the correct answer is option (D).

Note: The Sponges in the sea are not a plant, not a coral, it is considered to be an animal in which it is not having its brain nor it’s CNS. These sponges live on the ocean floor and permanently in the solid location under the water, and they are not moved. Sponges do not have an organ in their body instead they have cells in them to carry out the process.