Approximately 10% of people living in the United States are allergic to penicillin. A research team has developed a new antibiotic that could potentially replace penicillin and treat a wide variety of bacterial infections. To test their theory, the scientists grow Streptococcus pyogenes in petri dishes. S. pyogenes causes numerous infections in humans, like pharyngitis, tonsillitis, and scarlet fever. These diseases are normally treated successfully with penicillin. They expose S. pyogenes to their new strain of antibiotic to determine its effectiveness. What are good positive and negative controls?

Recently, crops of vegetables such as lettuce and green onions have been contaminated, while they are still on the farm, with bacteria that cause food poisoning. how will science influence the way the government responds to prevent an increase in food-borne diseases? because science has shown that lettuce and green onions are not nutritionally valuable, the government may pass laws that ban the sale of lettuce and green onions. because science has shown that there is no way to prevent bacterial contamination, the government may pass laws that punish businesses that buy lettuce and green onions. because science has shown that the washing of hands prevent the spread of infectious diseases among people, the government may pass laws that require hand washing by everyone who handles food. because science has shown there are ways to find the source of the contamination, the government may pass laws that require farm practices that reduce the contamination of lettuce and green onions.