[Free Registration/Login may be required to access all resource tools.] When you see an organism that you have never seen before, you probably put it into a group without even thinking. If it is green and leafy, you probably call it a...

Take an interactive quiz over the classification of living things. After completing the quiz, check your score, and then revisit any incorrect question for further review.

Take this interactive, multiple-choice quiz over classification of organisms, then review your score and any missed questions at the end.