Why do some archaeologist believe that people were unable to migrate from Asia and North America along a land bridge

Below is a description of a resource that you're considering using for a research paper. as you read the description, keep in mind what you've learned about historical thinking skills and use those skills in evaluating whether or not to use the source.

What did passage of the immigration act of 1965 accomplish? the law lowered the number of asians allowed to immigrate to the us. the law allowed no more immigration from european nations. the law supported victims of political persecution. the law made an effort to establish a quota system.

What is a country called that is technically independant but is controlled by another country