What is the purpose of putting antibiotics in agar in the transformation?

What is the purpose of putting antibiotics in agar in the transformation? b. What is the purpose of putting the restriction site in the middle of the z-gene? A. For each of the labeled bacteria shown: use the relevant terms to describe it B. describe how it could be eliminated/identified A. B. C 5. Amplifying the Gene of Interest . What can we know about all inserted fragments in these bacteria? b. What can we NOT know about them?