What Percentage of the U

question 49

Multiple Choice

What percentage of the U.S.population is older than 65 years?

• A)2 percent
• B)15 percent
• C)22 percent
• D)23 percent

---

Definitions:

Organic Soup

A hypothetical mixture of organic molecules from which life on Earth could have originated, prebiotically existing in the Earth's early oceans.

DNA Or RNA

Molecules that contain the genetic information for the synthesis of proteins and control of cellular activities; DNA is double-stranded while RNA is typically single-stranded.

Enzymes

Biological catalysts that speed up the rate of chemical reactions in the body without being consumed or permanently altered.

Electric Spark

A sudden discharge of electricity through the air, producing a bright flash of light and often accompanied by a sharp crackling sound, typically occurring when a high voltage is applied across a gap in a circuit.