An Elk Herd Is Observed Over Many Generations

question 67

Multiple Choice

An elk herd is observed over many generations. Most of the full-grown bull elk have antlers of nearly the same size, although a few have antlers that are significantly larger or smaller than this average size. The average antler size remains constant over the generations. Which of the following effects probably accounts for this situation?

• A) directional selection
• B) stabilizing selection
• C) a bottleneck effect that resulted in low genetic diversity
• D) a high rate of gene flow

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Definitions:

Diabetes Mellitus

A group of diseases characterized by high levels of blood glucose resulting from defects in insulin production, insulin action, or both.

Nephron

The structural and functional unit of the kidney, with each kidney containing approximately 1 million nephrons.

Glomerulus

A collection of capillary vessels within the kidney involved in the initial formation of urine.

Renal System

The body's system that includes the kidneys, ureters, bladder, and urethra, responsible for filtering waste from the blood and producing urine.