The Labor Force Equals the Number of People

question 178

Multiple Choice

The labor force equals the number of people:

• A)employed.
• B)aged 16 years and older.
• C)both employed and unemployed.
• D)employed, unemployed and discouraged.

---

Definitions:

Urea

Nitrogen-containing waste compound derived from ammonia; water is required to excrete it.

Malpighian Tubes

The excretory system of certain arthropods, like insects and spiders, used for removing wastes and maintaining osmotic balance.

Liver

Abdominal organ that produces plasma proteins and bile, filters the blood, and stores glycogen.

Urine Concentration

The process by which the kidneys regulate the water content and solute composition of urine, affecting its overall concentration.