To be classified as perennial, a plant must have a life cycle of more than how many years?

More Questions:

The Caldecott Medal is an award given in what field?

Where were police dogs first used?

Is it true that the Special Sauce on a Big Mac is Thousand Island Dressing?

Which is the largest of the Canary Islands?

Malé is the capital of which Asian country?

What is the World's 9th largest country by land area?

In the human body, what does the ureter carry?

Seafloor spreading at midoceanic ridges is how scientists first discovered the periodic reversal of what?

What language does the word "algebra" come from?

By what common name do we refer to "hook and loop" fasteners as?

What is measured in Kelvins?

Which band member of Blind Melon died of drug overdose?

Who won an Academy Award for her role as Lisa Rowe in the 1999 movie "Girl, Interrupted"?

What former US President died one week before the 1973 cease fire in Vietnam?

What year did Alfred Hitchcock release his first American made film?