Problem: Which creature has a chemical in its saliva which prevents blood from clotting?
Answer: vampire bat

Problem: What originally American familial (that's familial, not familiar) term refers to a small shop or business run by a married couple?
Answer: mom and pop

Problem: Which aeronautics company built the advanced trainer the 'Gnat', for the RAF in 1968?
Answer: hawker siddley

Problem: What is the the only US state whose name contains only one syllable?
Answer:
maine