What is believed to have allowed ancient people to migrate to north and south america

the ocean was frozen over between Alaska and Russia or if your an evolutionist then it was Pangea and when the continents split they all evolved into what we are today

lying without the limits of the several states; and may permit them, at such times, and in such manner as it

legislative branch:

one of the three branches of government divided between the senate and the house of representatives.

- creates or makes laws

- power to override a veto

executive branch:

one of the three branches of government, headed by the president.

- enforces or carries out laws

- power to veto a bill sent to it by congress

judicial branch:

one of the three branches of government, headed by the chief justice of the supreme court.

- interprets laws

- power to declare laws or actions by the government unconstitutional