In the Phylogeny Depicted in the Figure, the P Species

question 6

Multiple Choice

In the phylogeny depicted in the figure, the P species are from the Pacific side and the C species are from the Caribbean side of the Isthmus of Panama. Which of the following is the most likely cause of speciation?

• A) sympatric speciation
• B) parapatric speciation
• C) allopatric speciation via dispersal across the Isthmus of Panama
• D) allopatric speciation via isolation when the Isthmus of Panama closed

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Definitions:

Geologic Structure

The arrangement and relationship of rock layers and formations, shaped by tectonic forces, that reveals the history of Earth's crust.

Anticlines And Synclines

Geological features where rock layers are folded upwards to form ridges (anticlines) and downwards to form troughs (synclines), often due to tectonic forces.

Thrust Faults

A type of fault where rocks on one side are pushed up and over rocks on the other, often associated with mountain building.

Volcanic Center

A location on the Earth's surface that has been the site of multiple volcanic eruptions and activities over a long period.