An example of a grad-school level question?
A negative effect of the invention and use of paper is the

An example of a grad-school level question?
A signal from the brain to a muscle in the arm is transmitted by which structures?

An example of a grad-school level question?
When it rains, some animals will ___.

An example of a grad-school level question?

Beach pollution includes sewage, paper and plastic containers, and oil from boats. Which beach activity most likely increases beach pollution?