Biology Crossword Puzzle

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Across
  1. 6. King or queen
  2. 7. Related to mass production and factories
  3. 8. Forced labor without pay
  4. 10. Rebirth of art and learning in Europe
  5. 11. Territory controlled by another country
Down
  1. 1. Medieval system of lords and vassals
  2. 2. Government by the people
  3. 3. Advanced society with cities and laws
  4. 4. Group of states or countries under one ruler
  5. 5. Religious war during the Middle Ages
  6. 9. Sudden change in government or society