An example of a grad-school level question?
Oscar and Andre used a microscope to observe a sample of pond water and drew an example of each type of organism they saw. Then they compared their drawings. They discovered that their drawings of a euglena and a paramecium were alike, but their amoeba drawings had very different shapes. What are two things that Oscar's amoeba could have been doing that made his drawing look different from Andre's?

An example of a grad-school level question?
Which adaptation allows a fish to get oxygen underwater?

An example of a grad-school level question?
What is an environmental threat posed by oil and gas acquisition and transport that is not posed by the acquisition and transport of the energy resources uranium, and wood?

An example of a grad-school level question?
Which of the statements is the most accurate in describing the chemical equation shown below? 2H_{2}(g) + O_{2}(g) -> 2H_{2}O(g) + energy