1 What is the purpose of the lactose in this experiment? Is this tube used for selection, enrichment or as differential media? 2 is the EMB plate media selective, enrichment or differential? 3 If there are coliform bacteria in your water source, where do you think they came from? 4 What is the purpose of a Durham tube inside a broth tube? 5 If we checked the growth on the EMB plate by making a Gram stain and checking under a microscope, what kind of bacteria would be expect to see? What shape? What color? Lab 18 Racteria in Mator 6 considering these two tests, modified presumptive and confirmed, are only 2/3 of the required testing for water quality, do you think this is a reasonable test to depend on to ensure the quality of our drinking water? Why or why not? ) Brush cleaner Hand soup SSDT MOI IM.Roseus