An example of a grad-school level question?
Which process moves an ion across a cell membrane against the concentration gradient?

An example of a grad-school level question?
Which property of water can cause a rock to break apart?

An example of a grad-school level question?
Scientists working for a company are testing a new medicine that they think will help heal damaged tissue. In which part of the company are the scientists working?

An example of a grad-school level question?
Why is the ozone content of the stratosphere important to living organisms?