Your Textbook Authors Make the Claim That "Sympatric Species with Matching

question 22

Multiple Choice

Your textbook authors make the claim that "sympatric species with matching chromosome numbers are rare." Why is this?

• A) because allopatric speciation is far more common
• B) because sympatric speciation has only been hypothesized but not documented
• C) because coexisting populations need a boundary to gene flow before divergence can occur, and differences in chromosome numbers provide this
• D) because macroevolution is just a theory

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Definitions:

Sociobiology

A branch of biology that explains social behavior in all species by considering evolutionary advantages and genetics.

Mores

The essential or characteristic customs and conventions of a community.

Folkways

Informal norms or customs that guide everyday conduct and social interactions within a particular culture or community.

William Sumner

A pioneering American sociologist and economist known for his work on social Darwinism and folkways.