In the Oceans on Either Side of the Isthmus of Panama

question 46

Multiple Choice

In the oceans on either side of the Isthmus of Panama are 30 species of snapping shrimp; some are shallow-water species, others are adapted to deep water. There are 15 species on the Pacific side and 15 different species on the Atlantic side. The Isthmus of Panama started rising about 10 million years ago. The oceans were completely separated by the isthmus about 3 million years ago.
In the figure, the isthmus separates the Pacific Ocean on the left (side A) from the Atlantic Ocean on the right (side B) . The seawater on either side of the isthmus is separated into five depth habitats (1-5) , with 1 being the shallowest.

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In which habitat should one find snapping shrimp most closely related to shrimp that live in habitat A4?
In which habitat should one find snapping shrimp most closely related to shrimp that live in habitat A4?

• A) A3
• B) A5
• C) B4
• D) either A3 or A5

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Definitions:

Carbohydrates

Organic compounds, including sugars, starches, and fiber, that serve as a major energy source for the body.

Isometric Exercises

A form of strength training where the muscle length and joint angle do not change during contraction, such as planks or wall sits.

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Tightening or shortening of muscles, tendons, or skin which restricts regular movement, often due to lack of use or immobilization.

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The ability of a muscle or group of muscles to exert force against resistance.