Q1. Suppose that you have been chosen as the biologist for the design team implementing a self-contained space station to be assembled in orbit. It will be stocked with organisms you select, creating an ecosystem that will support you and five other people for two years. Explain the main functions you expect the organisms to perform. List the types of organisms you would select, and explain why you chose them.

Q2. Biologists in United States are concerned that populations of many migratory songbirds, such as warblers, are declining. Evidence suggests that some of these birds might be victims of pesticides. Most of the pesticides implicated in songbird mortality have not been used in the United States since the 1970's. Propose a hypothesis to explain the current decline in Songbird numbers. Suggest an experiment that could test your hypothesis.