An example of a grad-school level question?
Lori owns a house next to the lake. She uses lots of fertilizer to keep her lawn green. Which impact could fertilizing her lawn have on the lake?

An example of a grad-school level question?
Which of these statements is not considered part of the Big Bang Theory?

An example of a grad-school level question?
After mining removes layers of rock from a hillside, new plants begin to grow in the cracks of the bare rock. The plants beginning to grow are an example of which natural process?

An example of a grad-school level question?
An abiotic factor that most influences the organisms living in a salt marsh is