Volvox
No. Bacteria are.
cell
Bacteria
spines
Sponges
A community is the simplest grouping of more than one organism in the biosphere.
Amoeba sponges
amoeba
a community
Organism.
The simplest level of multicellular organization occurs in colonial organism. A colonial organism also called a colony is an organism of a few to many cells that are loosely attached to each other and that show little or no specialization among themselves.
The simplest living thing is known as cynobacteria. This organism is also thought to be the first organism that thrived on earth billions of years ago.