Question

You have some old plastic Petri dishes that you would like to use for pouring bacteriological agar plates. The only method of physical sterilization is ultraviolet radiation sterilization with your UV light (you cannot use the autoclave because it will disfigure and melt the plastic). After sterilizing the plates, pouring the sterilized agar medium, and then leaving the plates out at room temperature for a day or two to let them solidify and dry, you find contaminating bacterial colonies growing on the agar. Predict what has happened in this situation

Answer 1

Answer:

There is no short answer.

Explanation:

It is stated in the question that the petri dishes were contaminated during their sterilization process under UV light and bacterial colonies are found growing on the agar that is poured into the petri dishes.

One of the possible explanations of this situation is that the petri dishes' lids were not on during the sterilization process and that way the bacterial colonies got into the bacteriological agar plates.

I hope this answer helps.