Multicellular organisms are organisms consisting of more than one cell, and having differentiated cells that perform specialized functions in the organism. Most life that can be seen with the naked eye's multicellular, as are all members of the kingdoms Plantae and Animalia (except for specialized organisms such as Myxozoa in the case of the latter). Evolutionary history Early life was most probably single celled and multicellularity has appeared dozens of times in the history of Earth. In order… (More on Multicellular)