A newly discovered microorganism has a circular chromosome that is complexed with histones,but not enclosed within a membrane.The plasma membrane lipids include glycerol dietethers and diglycerol tetraethers.There are no mitochondria or chloroplasts,but the cells do contain 70s ribosomes.This microbe most likely is

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The characteristics described, including a circular chromosome complexed with histones, plasma membrane lipids including glycerol dietethers and diglycerol tetraethers, and the absence of mitochondria and chloroplasts, are characteristic of archaea rather than bacteria, protozoa, or fungi. Additionally, the presence of 70s ribosomes is consistent with archaea.

A Newly Discovered Microorganism Has a Circular Chromosome That Is