A Once-Common Species of Butterfly Has Disappeared from a Region

question 219

Multiple Choice

A once-common species of butterfly has disappeared from a region of California over the past 50 years.The butterfly's gradual disappearance is correlated with a significant rise in average annual temperature and a significant decline in average annual rainfall.This suggests that the butterfly's disappearance is due to a change in

• A) climate, because butterflies only react to climate, not weather.
• B) climate, because the 50-year trend altered butterfly distribution.
• C) weather, because 50 years is not long enough for climate to change.
• D) weather, because heat and drought are weather, not climate, factors.
• E) some factor other than weather or climate that has not been measured.

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Definitions:

Substitution Bias

The distortion in calculating inflation that occurs when consumers switch their spending from higher-priced goods to lower-priced alternatives.

CPI

CPI, or Consumer Price Index, measures the average change over time in the prices paid by urban consumers for a market basket of consumer goods and services.

Cost Of Living

refers to the amount of money needed to cover basic expenses such as housing, food, taxes, and healthcare in a certain location and time period.

Quality

The standard of something as measured against other similar things, often associated with excellence, durability, or the ability to meet specified requirements.