A deficiency of which vitamin can lead to night blindness?

More Questions:

What is the five-letter term for a rabbi who performs ritual circumcisions?

What famous horse belonged to Don Quixote?

How many letters are in the Hawaiian alphabet?

George Orwell's "Animal Farm" is a roman à clef for what historical event?

Mentu is the Egyptian god of what?

What does the Latin word "Verbatim" literally means?

Which ocean is the world's largest ocean?

What is the capital of Guyana?

Where was the first mobile automaton, named "Beast', built in?

What canals in the human ear serve as the body's balance organ?

Where in the body are the adenoids?

Jonas Salk discovered a vaccine for what disease?

What wrestler supplied the torso for the Scorpion King in the movie "The Mummy Returns"?

On what sea did the "Battle of Jutland" take place?

What state borders Alabama to the north?