1. of the 50,000 species introduced into the united states, half are plants. describe two ways in which non-native plants might be brought to a new location. how might we prevent non-native plants from establishing in new areas and altering communities?

Began during presidency of john q. adams tariff of 1828 and 1832 states’ rights versus federal authority john c. calhoun’s ‘proclamation to the people of south carolina’ concluded during the presidency of andrew jackson is which event are these characteristics describing