If the Population Is 300 Million, with 70 Million Under

question 16

Multiple Choice

If the population is 300 million, with 70 million under the age of 16 and institutionalized, another 70 million not in the labor force, 10 million unemployed, and 150 million employed, the employment-to-population rate is

• A) 53.3 percent.
• B) 65.2 percent.
• C) 46.7 percent.
• D) 87.5 percent.

---

Definitions:

Heterocysts

Specialized nitrogen-fixing cells found in some filamentous cyanobacteria, providing an anaerobic environment necessary for the fixation of atmospheric nitrogen.

Nitrogen Cycle

A biochemical cycle that involves the conversion of nitrogen into multiple chemical forms as it circulates among the atmosphere, terrestrial, and marine ecosystems.

Nitrification

A microbial process in the nitrogen cycle where ammonia is converted into nitrite and then into nitrate.

Atmosphere

The layer of gases surrounding a planet, essential for life on Earth, providing air to breathe and protecting from harmful solar radiation.