what describes an organism that carries out all its life functions?

An organism that carries out all its life functions independently is described as a unicellular organism. These single-celled entities, such as bacteria and protozoa, perform essential processes like metabolism, reproduction, and response to stimuli within one cell. Unlike multicellular organisms, which rely on specialized cells and systems, unicellular organisms manage all necessary functions autonomously. This capability allows them to thrive in diverse environments.