Tonya placed a disk of filter paper in each of the following solutions: disinfectant 1, disinfectant 2,
disinfectant 3, and distilled water. While the four disks
were soaking in their respective solutions, she streaked a
sterile mutrient agar dish with a culture of E. coli
bacteria. Then, she placed each disk carefully onto the
mutrient agar dish, placed the lid on the dish, taped it
shut, and incubated the dish at 37°C for several days.
Figure 19-4 shows how the nutrient agar dish looked on
Day I and Dar 4.