The picture above shows a small pin, and on it there are millions of microscopic bacteria. Eubacteria is a kingdom of organisms who are prokaryotic, and instead have a nucleoid helping it function. Most bacteria are single celled and much smaller than eukaryotic cells and much simpler, in fact, around 15 million E. Coli bacteria can fit on a head of a pin like the one in the photo above. Most cannot perform compartmentalization like eukaryotic cells can.


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