Since World War II

question 123

Multiple Choice

Since World War II,

• A)air pollution has worsened in most U.S.cities.
• B)many new pollutants have been introduced or identified.
• C)the federal government has reduced its reliance on economic incentives as a means of reducing pollution.
• D)All of the above are correct.

---

Definitions:

Polysaccharides

Large molecules composed of long chains of monosaccharide units bonded together, serving various functions such as storage and structural roles in plants and animals.

Triacylglycerols

Lipids formed by three fatty acids linked to a glycerol molecule; a main form of energy storage in animals.

Phospholipids

Lipids in which two fatty acids and a phosphorus-containing group are attached to glycerol; major components of cell membranes.

Hydrocarbons

Organic compounds consisting entirely of hydrogen and carbon, often used as fuels and solvents.