Ridge Counts on Fingerprints Are Approximately Normally Distributed, with a Mean

question 17

Multiple Choice

Ridge counts on fingerprints are approximately normally distributed, with a mean of about 140 and a standard deviation of 50. It then follows that 68% of the population will have:

• A)140 ± 50 ridges
• B)140 ± 68 ridges
• C)140 ± 100 ridges
• D)140 ± 150 ridges

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Definitions:

Epithelial Cells

Cells that line the surfaces of the body, including the skin, blood vessels, urinary tract, and organs, serving as a barrier and involved in absorption and secretion.

Connective Tissue

Tissue that supports, binds together, and protects organs, including blood, bone, and cartilage.

Blood

A fluid in the bodies of humans and other animals that delivers necessary substances such as nutrients and oxygen to the cells and transports metabolic waste products away.

Evolutionary Constraints

Limitations on the course or outcome of evolutionary changes; these can be due to physical, genetic, or environmental factors.