E. coli resistance to heavy metals discusses this topic in terms of genetic coding. For more detail on this, see the Results section.
             The four mentioned bacteria are placed and spread into twelve separate agar plates (three agar plates for each bacteria sample), and each agar plate is separated into three sections using a grease pencil. Using clean, sterile forceps, filter paper is then soaked in one of the solutions, placed in one of the three sections in each of the agar plates (EXCEPT for four of the agar plates, as these will be used as controls). Do this for each solution and place in separate sections in the agar plates. For the four extra agar plates, place DRY filter
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