The Executive branch must receive approval from "the Senate" when appointing heads of executive departments, ambassadors, and Federal Court Judges, since this is one of the most important examples of the system of "checks and balances" that exists in the US.
Possibly, though I can't really say.
Deoxyribonucleic acid (DNA) is a nucleic acid that contains the genetic instructions for the development and function of living things. All known cellular life and some viruses contain DNA.
<em>The main role of DNA in the cell is the long-term storage of information.</em>
The supply of books were increasing greatly in Europe from the 15th century to the 18th century.