An example of a grad-school level question?
In the summer, the Arctic fox's fur is dark gray or brown. In the winter, its fur is white. The changes in color enable the fox to

An example of a grad-school level question?
Two flowers are both roses. One rose is larger and has more fragrance than the other rose. What advantage will one of the roses most likely gain because of this difference?

An example of a grad-school level question?
Which results in a chemical change?

An example of a grad-school level question?
Kerry made a simple flashlight. She recorded the following statements in her lab book. Which statement is an inference?