1. Write out a food chain that starts with plankton and ends with humans. Why is an understanding of the food chain important to the economic analysis of plant and animal species?
2. What is the most you would be willing to contribute in a one-time payment for the return of the passenger pigeon (Ectopistes migratorius)? What is the least you would accept in a one-time payment for the loss of the white-crowned pigeon (Columba leucocephala)? Explain why these values are different, or why they are the same.

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