The term, that best describes an organism that can contain up to five levels of organization to carry out life functions IS MULTI CELLULAR. A multi cellular organism refers to an organism that is made up of many cells. The cells in multi cellular organisms are found in five different levels, these are: cells, tissues, organs, systems and organism. The cell level is the most basic level while the organism level is the most advanced level. Multi cellular organisms can operate in all these five levels.