USA HISTORY

Detailed explanation-1: -As Europeans traversed the Atlantic, they brought with them plants, animals, and diseases that changed lives and landscapes on both sides of the ocean. These two-way exchanges between the Americas and Europe/Africa are known collectively as the Columbian Exchange.

Detailed explanation-2: -From the Eastern Hemisphere, explorers brought illnesses such as smallpox and malaria. Native Americans who were living in the Western Hemisphere had never been exposed to these diseases, and thus their bodies had built up no immunities to them. Consequently, millions of native peoples perished.

Detailed explanation-3: -The list of infectious diseases that spread from the Old World to the New is long; the major killers include smallpox, measles, whooping cough, chicken pox, bubonic plague, typhus, and malaria (Denevan, 1976, p.

Detailed explanation-4: -The arrival of Europeans in the Americas brought more than a clash of peoples and cultures. It also brought a movement of plants, animals, and diseases between the Eastern and Western hemispheres. This movement of living things between hemispheres is called the Columbian Exchange.

Detailed explanation-5: -The Columbian Exchange brought horses, cattle, sheep, goats, pigs, and a collection of other useful species to the Americas. Before Columbus, Native American societies in the high Andes had domesticated llamas and alpacas, but no other animals weighing more than 45 kg (100 lbs).