An organism is a prokaryote whose cell membrane contains fatty acids. Which of the six kingdoms is it in?

There are three domains of life, archea, bacteria and eukarya that are then divided into six kingdoms. Prokaryotes are single cellular organisms with no cell nucleus and lack membrane bound organelles in their cells. Kingdom Eubacteria in the bacteria domain consists o prokaryotic organisms whose cell surface contain, cell membrane containing fatty acids and a cell wall containing peptoglycans. Therefore, the answer is kingdom Eubacteria.