An example of a grad-school level question?
During subduction, one tectonic plate is forced below another. The subducting plate is forced into the

An example of a grad-school level question?
On a field trip, a student holds a frog and reports that it has slippery skin. This is an example of

An example of a grad-school level question?
Natural selection cannot occur without

An example of a grad-school level question?
A condition in bees called "colony collapse disorder" occurs when worker bees leave the hive to collect nectar and never return. How would a decline in the bee population most likely affect a farm ecosystem?