Question: What was the purpose of inoculating two wells with media only? How did the A570 for these wells c…

What was the purpose of inoculating two wells with media only?
How did the A570 for these wells compare to the A570 to the
wildtype and mutant wells? How can the A570 values from the media
only wells be used to help you compare the biofilm-forming ability
of the wild-type and mutant strains more accurately