An example of a grad-school level question?
Plants make sugars in the presence of sunlight in a process called photosynthesis. What form of carbon do the plants take in for this process?

An example of a grad-school level question?
Radio signal interruption sometimes causes a humming or buzzing sound. These sounds are most likely caused by

An example of a grad-school level question?
Sleet and hail are forms of

An example of a grad-school level question?
Which is a way the agricultural biotechnology industry could have a positive impact on the environment?