Question

Are sponges unicellular?

Answer 1

Sponges:

1. Sponges belong to the phylum Porifera.
2. They have a cellular level of organization and lack tissues, thus being multicellular organisms.
3. They have channels and pores which help in water circulation.
4. Numerous cells are associated together and perform similar functions to sustain the organism.
5. Choanocytes (control water movement), porocytes (control the amount of water), amoebocytes (deliver nutrients and produce eggs), and pinacocytes (form the outermost layer).