Which middle layer of a tooth contains the root canals?

More Questions:

Of the four suits in a deck of cards, which suit is the highest ranking in a game of bridge?

Which literary work's title character is named Oliver Mellors?

What children's classic first chapter is titled "The Old Sea-dog at the Admiral Benbow"?

What US state's southern border is marked by the original Mason Dixon Line?

What Texas city is nicknamed "The Yellow Rose of Texas"?

Who played the leading female part in the 1954 film "A Star Is Born"?

In which movie did Billie Burke portray a witch?

In what year was Puff Daddy's "I'll Be Missing You" song released?

Who narrated the 2007 movie "Enchanted"?

What sport is the focus of the movie "Fat City"?

What was Jonathan Richman's backing band?

What did Elwood trade for a microphone in the movie "The Blues Brothers"?

Who had the fingers on his left hand glued together to make his disability look more real in the movie "The Usual Suspects"?

Who was elected to the Senate seat vacated by New York Democrat Daniel Patrick Moynihan on January 3, 2001?

Who created the "Dragonriders Of Pern" series?