An example of a grad-school level question?
Louis Pasteur discovered a process that allows milk to be stored in sealed containers for long periods of time without spoiling. The process, called pasteurization, involves heating the milk before placing it in the sealed containers.Which is the best explanation of how pasteurization works?

An example of a grad-school level question?
A group of vertebrates has lungs, a body covered with scales, internal fertilization, and amniotic eggs. Which group of vertebrates does this describe?

An example of a grad-school level question?
Conjugation in a paramecium differs from sexual reproduction in volvox because conjugation

An example of a grad-school level question?
Which of the following is an example of genetic engineering?