Use the Following Information When Answering the Corresponding Questions)

question 39

Multiple Choice

Use the following information when answering the corresponding questions) .
In 1983, a population of dark- eyed junco birds became established on the campus of the University of California, San Diego UCSD) , which is located many miles from the junco's normal habitat in the mixed- coniferous temperate forests in the mountains. Juncos have white outer tail feathers that the males display during aggressive interactions and during courtship displays. Males with more white in their tail are more likely to win aggressive interactions, and females prefer to mate with males with more white in their tails. Females have less white in their tails than males, and display it less often. Pamela J. Yeh. 2004. Rapid evolution of a sexually selected trait following population establishment in a novel habitat. Evolution 58[1]:166- 74.)
-Based on the information given above, which of the following types of selection was most likely initially involved in the evolution of white outer tail feathers in juncos?

• A) stabilizing selection
• B) disruptive selection
• C) sexual selection
• D) directional selection

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Definitions:

Proprioception

Ability of the body to sense its position and movement in space.

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The amount of force a muscle can produce, important for physical performance and mobility.

Body Alignment

The optimal positioning of the body parts to promote proper function and reduce the risk of injury, often emphasized in ergonomics and physical therapy.

Scoliosis

A medical condition characterized by an abnormal lateral curvature of the spine, which can vary in severity and may require treatment ranging from observation to surgery.