What is added to bread to make it swell?

More Questions:

What color is the square that's the logo for H&R Block?

What kind of creatures are Nag and Nagaina who plan to kill Rikki-Tikki-Tavi in "The Jungle Book"?

In the book "Animal Farm', what boar originally encouraged the other animals to rebel against Farmer Jones?

In what US state would you find Fort Shafter?

Accra is the capital of which country?

Dhaka is the capital of which country?

Which eastern US state is home to the Kittatinny Mountains?

What are the twin stars in the constellation of Gemini called?

Which elephant can't be domesticated, the African or Indian?

How many episodes of "The Bob Newhart Show" were made?

What does Doctor Who's vast spacecraft, the TARDIS, look like from the outside?

What hip-hop artist is featured on Destiny's Child's first single "No, No, No"?

How many Soldiers made up a Roman Cohort?

What was Liu Bang, founder of the Han Dynasty, posthumously known as?

What is the winter counterpart to Aestivation?