Which of the Following Observations Is an Example of a Positive

question 58

Multiple Choice

Which of the following observations is an example of a positive correlation?

• A)When a population's intake of plant foods decreases,the percentage of obese people in that population increases.
• B)When a population's vitamin D intake decreases,the percentage of people in the population that have healthy immune systems decreases.
• C)When a population's level of vitamin C in white blood cells increases,the percentage of people in the population who develop scurvy decreases.
• D)When a population's level of physical activity increases,the percentage of people who develop heart disease decreases.

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Definitions:

Pharynx

The muscular tube that extends from the back of the nose to the esophagus, part of the digestive and respiratory systems.

Small Intestine

A long, coiled section of the digestive system where most digestion and absorption of nutrients and minerals from food occurs.

Duodenum

The first section of the small intestine, immediately beyond the stomach, that plays a critical role in digestion.

Jejunum

The middle section of the small intestine between the duodenum and ileum where the absorption of nutrients occurs.