File:Cultured bacteria.jpg

http://images.google.com/imgres?imgurl=http://www.rothamsted.ac.uk/ppi/rhizo2/images/Picture5.jpg&imgrefurl=http://www.rothamsted.ac.uk/ppi/rhizo2/&usg=__evAoPJQxq9PO3COmPwCmGsCpXqI=&h=275&w=282&sz=19&hl=en&start=4&um=1&tbnid=04JFlAOLFXaB6M:&tbnh=111&tbnw=114&prev=/images%3Fq%3Dcultured%2Bbacteria%26hl%3Den%26rls%3Dcom.microsoft:*:IE-SearchBox%26rlz%3D1I7ADBF%26sa%3DN%26um%3D1