An example of a grad-school level question?
The Davis Mountains in West Texas used to be taller than they are now. Which of the following conditions most likely caused the mountains to become shorter over time?

An example of a grad-school level question?
Genes are located on chromosomes which are composed of

An example of a grad-school level question?
The human body is composed of different systems made of specialized cells, tissues, and organs. Each of these structures has a specific function that aids in the survival of the human species. Which organs are used in reproduction?

An example of a grad-school level question?
An element with which property would be best to use in electrical wiring?