Bacteria: a member of a large group of unicellular microorganisms that have cell walls but lack organelles and an organized nucleus, including some that can cause disease.
Slime Mold: a simple organism that consists of an acellular mass of creeping jellylike protoplasm containing nuclei, or a mass of amoeboid cells. When it reaches a certain size it forms a large number of spore cases.
Microbe: a microorganism, especially a bacterium causing disease or fermentation.
