What is an external agent that alters foetal development is called?

More Questions:

What does the abbreviation WWW stand for?

Which bird is the national bird of Argentina?

A Murphy bed is also known as a what?

Which type of nonsensical humorous verse was popularized by Edward Lear?

What brief tune was Chopin's attempt to describe a puppy chasing its tail?

What Shakespeare play if "All the world's a stage"?

Into which sea does the Nile river flow?

What US city is nicknamed "Beantown"?

In vertebrates, what name is given to any muscle with three heads?

What popular breed of pet rabbit was named for the Asian capital where it was first domesticated?

What "h'word is the unit of measurement used to determine the height of a horse?

Who composed the title music to TV's "Inspector Morse"?

Nick Carter was a member of which boy band?

What English legal document was signed in 1215?

Though not published first, which book in "The Chronicles of Narnia" series comes first chronologically?