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Which organisims can cause diseases a. micro organisims b. multicellular organisnims c. both d. neither

This is an ap world history question. i am working on a worksheet which has a vent diagram with each circle labeled either us or byzantine economy. the middle is the similarities. can someone explain to me the similarities and especially the differences between the two?

In which of the following conflicts did the distribution of ethnic groups act as a centripetal force? cyprus afghanistan north and south korea iraq former yugoslavia