Confidence votes 90.2K. An organism is an individual form of life, such as plants, animals, protist, bacterium, or fungi. It is a body made up of organs, organelles, or other parts that work together to carry on the various processes of life.An organism is a term used to describe a living thing like a plant or animal.n organism is an individual form of life, such as plants, animals, protist, bacterium, or fungi.