Data for selected vegetables purchased at wholesale prices for 1995 and 2007 are shown next. 
What is Paasche's price index?
Definitions:
Coevolve
The process by which two or more species reciprocally affect each other's evolution through natural selection.
Mutualistic
A type of symbiotic relationship where both organisms involved derive benefit from the association.
Indicator Species
Species whose presence and abundance in a community provide information about conditions in the community.
Air Pollution
Contamination of the indoor or outdoor environment by any chemical, physical or biological agent that modifies the natural characteristics of the atmosphere.
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