Which is an accurate description of the Columbian Exchange? the disastrous introduction of unknown species to European ecosystems

the migration to the Americas of Europeans seeking wealth and opportunity

the transfer of plants, animals, people, and diseases between hemispheres

the movement of Native Americans to Europe after Columbus's voyage

the Columbian Exchange was the arrival European people plants animals and diseases in the American that happened when Columbus and sequin explorers arrived in North and South America

(202 bc - 220 ad) dynasty started by lui bang; a great and long-lasting rule, it discarded the harsh policies of the qin dynasty and adopted confucian principles; han rulers chose officials who passed the civil service exams rather than birth; it was a time of prosperity

hr2520 is the patient's act. there is required the secretary of health to summon a committee to develop a national strategic plan of prevention. this committee has forth provisions that make possible for the govern entities to acquire private health insurance services.

is easier to keep this hr2520 as federal, because that way the secretary of health has centralized power to deal with private insurance companies and the federas government has more ways and power to negotiate with them, than doing this process state by state in their specific terms.