eubacteria (YOO bak TIHR ee ah): group of bacteria thought to have evolved more recently than the archaebacteria; from the Greek eu- + bakterion, meaning "true" + "small staff"
Biologists separate the bacteria into two groups that differ in the composition of their cell walls and cell membranes and in the structure of some of their proteins. Because the differences between these two group are so great, it is likely that they diverged early in the history of life. One group is the eubacteria, or "true bacteria" the most common bacteria today. Most living bacteria, including those that cause disease and decay, are eubacteria. Eukaryotic cells contain mitochondria and chloroplast, which are probably descendants of ancient eubacteria.
Johnson, George B., comp. "History of Life on Earth." Biology: Visualizing Life. Austin: Holt, Rinehart, and Winston, 1998. 195-197.
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