A student 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 nutrient agar dish with a culture of E. coli bacteria. Then she placed each disk carefully onto the nutrient agar dish, placed the lid on the dish, taped it shut, and incubated the dish at 37°C for several days.

What is the student probably trying to test?

Question

A student 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 nutrient agar dish with a culture of E. coli bacteria. Then she placed each disk carefully onto the nutrient agar dish, placed the lid on the dish, taped it shut, and incubated the dish at 37°C for several days.

What is the student probably trying to test?