Refer to the Figure

question 19

Multiple Choice

Refer to the figure.
These results, showing the change in testis length in male red crossbills over time, support the hypothesis that crossbills

• A) are reproductively opportunistic birds that maintain full reproductive capacity throughout the year.
• B) have an underlying reproductive cycle that is dependent on photoperiod.
• C) only use seed abundance, an unpredictable environmental cue, to determine reproductive capacity.
• D) do not rely on environmental cues to entrain their reproductive cycle.

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Definitions:

New Deal

A series of programs, public work projects, financial reforms, and regulations enacted by President Franklin D. Roosevelt in the United States during the 1930s in response to the Great Depression.

Totalitarianism

A political system in which the state recognizes no limits to its authority and strives to regulate every aspect of public and private life wherever feasible.

Segregation

The enforced separation of different racial groups in a country, community, or establishment, often discussed in the context of historical and modern social issues.

Economic Market

A system where buyers and sellers engage in the exchange of goods and services, often guided by supply and demand principles.