We are dedicating this year's quiz to Carl Linnaeus, whose 300th birthday is celebrated around the world on May 23, 2007

There are 16 questions in this multiple-choice quiz, 1 to 3 points each. You can receive a maximum score of 30.

Please don't make hasty decisions--there is no time limit. However, all of your decisions are final. Once you make your mind and click on a choice, you will not be able to make corrections: any selection will bring you right to the answer. You should not attempt using the 'back arrow' button while taking the quiz, because this might corrupt the entire session. Have fun.