Below are phylogenetic trees of vertebrates (A) and reptiles (B) . Using the data in these models, what might a Tyrannosaurus rex taste like? (A) 
(B) 
Definitions:
Price Index
A number that shows the average price of products; changes in a price index over time show changes in the economy’s average price level.
Price Level
A measurement of the average of current prices across the entire spectrum of goods and services produced in the economy.
Aggregate Demand
The relationship between the economy’s price level and aggregate output demanded, with other things constant.
Equilibrium Output
The level of output at which the quantity of goods produced equals the quantity of goods demanded.
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