Compare and contrast food chains and food webs. What are the strengths of each concept in describing ecosystems?
Describe freshwater, ocean, and terrestrial ecosystems.
Compare grazing and detrital food webs. Why would they both be present in the same ecosystem?
Compare the three types of ecological pyramids and how well they describe ecosystem structure. Identify which ones can be inverted and give an example of an inverted pyramid for each.
How does the amount of food a warm blooded-animal (endotherm) eats relate to its net production efficiency (NPE)?
Describe nitrogen fixation and why it is important to agriculture.
What are the factors that cause dead zones? Describe eutrophication, in particular, as a cause.
Why are drinking water supplies still a major concern for many countries?