List three factors that led to the spread of disease in cities

Andreus vesalius is known for being the first scientist to provide detailed and accurate

What does the case of mary dyer in 1660 illustrate? a. puritans practiced a fierce rhetoric but were lenient in practice. b. quakers had a tenuous grasp on the social realities of the english colonies. c. quakers were willing to defy authority even at their own personal risk and expense. d. quakers practiced their religion without a church and without clergy.

What from the columbian exchange had perhaps the biggest impact on the world?