An example of a grad-school level question?
Animals that eat both plant matter and meat are referred to as

An example of a grad-school level question?
When the wax from a candle drips, the wax has reached

An example of a grad-school level question?
Which event would most likely cause a rapid extinction of organisms?

An example of a grad-school level question?
Which of the following is a crucial piece of evidence supporting scientists' theory of how the continents and the ocean basins formed?