Answer:
Inoculate them in healthy animals.
Explanation:
Koch could hypothesize that the bacteria he isolated from sick animals was the cause of Anthrax; however, he could only confirm this by inoculating the isolated bacteria into healthy animals expecting them to get sick as well. After they got sick, he had to again isolate the same bacteria from them.
Public goods is provided goods from firms
Answer:
Folk culture is more likely to vary from place to place at a given time, while popular culture is more likely to vary from time to time at a given place.
Explanation:
Popular culture is often shared by several social groups at a given time or has at least several common characteristics, but it changes greatly throughout the time. Folk culture does not change so much throughout time but it can be greatly different for different cultural groups.