During the Observations of a Species of Blue Moon Butterflies

question 39

Multiple Choice

During the observations of a species of blue moon butterflies on the Samoan island of Upolu, 99% of the butterflies were female and only 1% were male. Only five years later the male:female sex ratio was 1:1. What caused this?

• A) Wolbachia lost the ability to kill all male butterflies.
• B) Genetic changes in the Upolu butterflies resulted in suppression of the male-killing effect of Wolbachia.
• C) Upolu butterflies evolved to become resistant to Wolbachia infection.
• D) Upolu was recolonized by butterflies from the nearby island Savali, where sex ratios were closer to 1:1.

Analyze the changes within American families and societal roles during the 1920s.

Describe the means of U.S. dominance over Latin America between the World Wars.

Identify the weaknesses in the American economic system that led to the 1929 stock market crash and the Great Depression.

Evaluate the impact and failure of Prohibition in the 1920s.

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Definitions:

Price Elasticity of Demand

A measure of how much the quantity demanded of a good responds to a change in the price of that good, computed as the percentage change in quantity demanded divided by the percentage change in price.

Binding Price Ceiling

A government-imposed limit on how high a price can be charged for a product or service, which is set below the market equilibrium price, leading to shortages.

Supply and Demand Relationships

Fundamental economic concepts that describe how the availability of goods (supply) and the desire for them (demand) interact to determine market prices and quantities.

Equilibrium Price

The price at which the quantity of a good demanded equals the quantity supplied, resulting in market equilibrium.