A multicellular organism is an organism which contains many different types of cells in contrast to unicellular organisms which are made of a specific single cell. Multicellular organisms such as plants, algae and animals evolved from specific unicellular organisms in the past.
- ↑ Richard K. Grosberg and Richard R. Strathmann. (10 August 2007). The Evolution of Multicellularity: A Minor. The Annual Review of Ecology, Evolution, and. 38 (1), 621–654.