Although the diseases transferred by columbian exchange resulted in a) a contraction of native populations in asia, the primary effect was a population boom. b) an increased population growth in africa, the long-term effect on global population was stable. c) the depopulation of the americas, the overall effect was a decreased population growth worldwide. d) the depopulation of the americas, the overall effect was an increased population growth worldwide.

The answer is C. The depopulation of the Americas, the overall effect was a decreased population growth worldwide.

Americans had never had diseases like smallpox, measles, whooping cough, among others, for that reason, they did not have defenses against them, when there was the interchange with the Europeans, there were a lot of deaths, which caused a big decreased in the population and in world general, because native people could not fight with those diseases.

chronological thinking is an indispensable tool to structure a historical narrative and to give meaning to a sequence of events. the final section presents the results of a survey to test the chronological thinking of lower secondary school students carried out by the educational research institute.

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