An example of a grad-school level question?
Lichens are symbiotic organisms made of green algae and fungi. What do the green algae supply to the fungi in this symbiotic relationship?

An example of a grad-school level question?
A city has a temperature of 75 F, with partly cloudy skies. Weather forecasters are predicting that the air pressure and temperature will drop during the day. Which type of weather is most likely for this area in the late afternoon?

An example of a grad-school level question?
A student needs to find the mass of an atom. The numbers of which atomic particles determines the mass of the atom?

An example of a grad-school level question?
Which of these cycles takes 24 hours?