They are multicellular just as people are. They have trillions of cells.
Multicellular
They are multicellular, complex organisms.
Multicellular
you times the singled celled one by two to get the multicellular organisim
All invertebrate means is lacking a spinal chord, so, there are many single-celled and many multi-celled invertebrates.
Multicellular
single-celled
single-celled
Single-celled. Most bacteria are single celled.
Members of the plant kingdom are multicellular. This is also true for animals. Bacteria are single celled and so are amoeba.
Multicellular
single celled