(2) NIAID, NIH.http://en.wikipedia.org/wiki/File:EscherichiaColi_NIAID.jpg.
Public Domain.(3) CDC.
http://commons.wikimedia.org/wiki/File:Staphylococcus_aureus_01.jpg.
Public Domain.(4) http://commons.wikimedia.org/wiki/Image:Arkea.jpg. GNU-FDL.(5) http://commons.wikimedia.org/wiki/File:Average_prokaryote_cell-_en.svg.
Public Domain.(6) Yutaka Tsutsumi.http://en.wikipedia.org/wiki/File:EMpylori.jpg. The
photographer of this work allows anyone to use it for any purpose including
unrestricted redistribution, commercial use, and modification..(7) http://commons.wikimedia.org/wiki/File:
Bacteria_morphologic_forms_simplified.svg. Public Domain.(8) NASA.http://commons.wikimedia.org/wiki/Image:Halobacteria.jpg. Public
Domain.(9) Stuart Chalmers.http://www.flickr.com/photos/gertcha/858758122/. CC-BY
2.0.(10) NOAA. Bluegreen_algae.jpg. Public Domain.
(11) Bacilli_division_diagram.png. GNU-FDL.
(12) Growing_colony_of_E._coli.jpg. GNU-FDL.
(13) NPS.http://commons.wikimedia.org/wiki/Image:Excelsior_geyser.jpg. Public
Domain.
