UnScramble this Word: e r s i l a?

Questions

History : Name Jacques Cousteau's research ship.?

History : Name the incident in which tea was dumped into the harbour.?

History : One who fought professionally in Roman arenas was a(n) ____________.?

History : She overcame her handicaps to become a lecturer and a scholar.?

History : She was Queen of Egypt and mistress of Julius Caesar.?