The Proportion of Americans Older Than Age 11 Who Smoke

question 125

Multiple Choice

The proportion of Americans older than age 11 who smoke is approximately:

• A) one-tenth.
• B) one-fourth.
• C) one-half.
• D) two-thirds.

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Definitions:

Soil Nutrients

Essential elements or compounds in the soil that support the growth and development of plants.

Rain Forest

Dense forests typically found in tropical regions, with high levels of biodiversity and rainfall.

Primary Limiting Factor

An environmental condition that most significantly restricts the growth, abundance, or distribution of an organism or a population.

Temperate Grasslands

Expansive areas of grassy fields found in regions with moderate temperatures throughout the year, often used for grazing and agriculture.