A Species of Bird Had an Original Range Covering the Entire

question 8

Essay

A species of bird had an original range covering the entire eastern half of the United States from New England down to Florida,west to the Rocky Mountains.During a period of glaciation,the eastern part of the range was cut off from the western part for 2000 years.Then the glaciers melted and the birds' original range was reestablished.During the separation,the western birds evolved a slightly different song and a darker wing color.Ornithologists are now studying this species to determine whether speciation has taken place.What evidence should they look for in their study?

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Definitions:

Racial Categories

Classification systems used to group people based on perceived or actual shared physical characteristics and ancestry.

Heterosexuality

The sexual attraction or sexual behavior between individuals of the opposite sex.

Implicit Assumption

An implicit assumption is an unstated belief or understanding that underlies and influences thoughts, actions, and decisions without being directly expressed or acknowledged.

Overt Racism

Blatant and openly exhibited racial prejudice and discrimination.