2172 | History | Multiple Choice | Hard | The Hagia Sophia was commissioned by which emperor of the Byzantine Empire? |
2171 | Science & Nature | Multiple Choice | Medium | What stage of development do the majority of eukaryotic cells remain in for most of their life? |
2170 | Geography | Multiple Choice | Easy | What is the name of the peninsula containing Spain and Portugal? |
2169 | History | Multiple Choice | Medium | What was the transfer of disease, crops, and people across the Atlantic shortly after the discovery of the Americas called? |