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Archeabacteria

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Archeabacteria
Eubacteria
Prokaryotes

Simple, small, single-celled bacteria Have NO nucleus and mitochondria Contain few organelles Lack membrane-bound organelles Do not have chromosomal DNA Instead their genetic information is in the form of a circular loop called a plasmid Reproduce asexually by binary fission Most prokaryotes have one of 3 basic shapes Bacillus = Rod-shaped Coccus = Spherical Spirillum = Helical-shaped All organisms in the primitive Earth were thought to be prokaryotic Prokaryotic cells do not depend on oxygen for respiration, therefore they are extremely diverse and live almost anywhere in the biosphere Bacteria were once classified as the Monera kingdom. But today biologists separate bacteria into two kingdoms: Archaebacteria Eubacteria Archae = Ancient

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