Summary:
- Biological organization exists at all levels in organisms.
- Single celled prokaryotes and eukaryotes show order in the way their cells are arranged.
- Single-celled organisms such as an amoeba are free-floating and independent-living.
- Multicellular organisms carry out their life processes through division of labor.
- Scientists think that multicellularity arose from cooperation between many organisms of the same species.
- The Colonial Theory proposes that this cooperation led to the development of a multice cellular organism.