Caption: Prokaryote
Text: The term is derived from Greek, meaning "before nucleus". Prokaryotes (bacteria) do not have a membrane-bound nucleus, like eukaryotes have. Instead, bacteria generally have a single circular chromosome that is located in the general interior of the bacterial cell. Prokaryotes have ribosomes, but they do not have any of the intracellular membrane-based organelles that eukaryotes have, such as endoplasmic reticulum or a Golgi apparatus.