Microbial Genetics
In the time since E. coli and Salmonella diverged evolutionarily

there has been little change in either genome
E. coli has acquired many genes via horizontal transfer
E, coli has lost approximately 50% of its genome
none of these

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Microbial Genetics
Which of the following theory is supported by the genomic sequence of the obligate intracellular parasite Rickettsia prowazekii ?

All bacteria evolved from viruses
Parasites have a definite genomic sequence similar to viruses
Parasitic bacteria have very large genomes
Mitochondria have evolved from endosymbiotic bacteria

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