House Finches Were Found Only in Western North America Until

question 6

Multiple Choice

House finches were found only in western North America until 1939,when a few individuals were released in New York City.These individuals established a breeding population and gradually expanded their range.The western population also expanded its range somewhat eastward,and the two populations have recently come in contact.If the two forms were unable to interbreed when their expanding ranges meet,what would this situation illustrate?

• A)vicariance
• B)allopolyploidy
• C)autopolyploidy
• D)allopatric speciation
• E)sympatric speciation

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Definitions:

Ribosome

Small, spherical, cytoplasmic organelle where protein synthesis occurs.

Chromosome

A structure made of DNA and proteins that contains the genetic information of a cell.

Cristae

Folded inner membranes within mitochondria that increase the surface area for ATP production during cellular respiration.

Cytosol

The fluid component inside a cell, separate from organelles or structures enclosed by membranes, where various cellular processes occur.