An example of a grad-school level question?
Why do dogs have most of the characteristics of their parents?

An example of a grad-school level question?
Which sense can be used to determine an object's ability to reflect light?

An example of a grad-school level question?
The greatest amount of diversity can be found among which type of organism?

An example of a grad-school level question?
The water contained in a geyser system gains energy from the underground material surrounding it. The water molecules gain kinetic energy and this results in an increase in the pressure of the water. Eventually the geyser erupts and expels water into the air above ground. Which of the following types of energy is the source for the initial energy gain of the water?