Studies find that a bacterium of the genus Buchnera has been living as a parasite of aphids for many millions of years. This bacterium lacks certain genes that are involved in the production of the cell wall found in other related bacteria. The field of biology in which such studies were carried out is called

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Comparative genomics involves comparing the genomes of different organisms in order to better understand their evolutionary relationships and identify genes that are unique to a particular species. In this case, the study compared the genome of Buchnera to other related bacteria to identify the genes that are missing in Buchnera.

Studies Find That a Bacterium of the Genus Buchnera Has