Answer:
The different level of government is solely responsible for foreign policy while the state governments and local governments may only make only make domestic policy.
DNA Sequencing is the process of determining the sequence in which the nucleotide bases.
Be the president of the United States
I'm not sure what you mean by "historically", but there are many key features of London:
Big Ben
Buckingham Palace
the Thames River
London Bridge
London Eye
Trafalgar Square
Hyde Park
Westminster Abbey
the Globe Theater
