Population Dynamics Quiz 3


Biogeochemical
Cycles Quiz I Ecosystem Ecology Test Energy Calculation Human Ecology Population Dynamics 
Algae are onecelled plants. They act exactly like "big" plants except that since they are only one cell big, snails, and some fish eat them for food. 1. What basic assumption makes any exponential growth flawed? 2. The alage in my aquarium are reproducing at a rate of .08 per day. Currently, there are 100 cells/cm2. When will there be 400 cells/cm2? 3. What is the ZPG for humans right now? 4. The typical predator prey curve is a sequence of Jcurves. A government biologist, Patsy, claims to have found way by which the preys population can be made sigmoidal. What might the idea be? 5. Sketch and label the three population pyramids. 6. For the pyramids above, which best represents a preys (such as earthworms) profile? Explain your logic. 