Consider the last 400 years of history, was the Columbus Exchange mostly positive or negative for Europe and for the Americas and why?

In 1073, the fight over who gets to choose bishops was between pope gregory vii and king henry the iv. t or f

What do most climatologists see as a major cause of rising global temperatures? a. earth's closer proximity to the sun due to its gravitational pull b. greenhouse gases produced by burning fossil fuels c. rising ocean levels caused by melting polar ice sheets d. water pollution cause by industrial waste

After world war ii, many japanese territories were increasingly difficult for japan to control. placed under the control of other nations. granted independence from japan. supportive of the us occupation.