McGraw-Hill Online Learning Center Test

McGraw-Hill Online Learning Center Test


1. Review the image and answer the following questions.

Why are certain pollutants carcinogenic?

A. They poison the body and thus lead to cancer.
B. Certain pollutants are carcinogenic because they are mutagens.
C. Some pollutants cause cancer in lower organisms that spreads through the food chain.
D. Scientists do not know whether there is a direct relationship between pollution and cancer.


2. Why are cancer rates so high along the east coast and Mississippi River delta?

A. The populations inhabiting these areas are genetically susceptible to cancer.
B. Acid rain tends to fall in these areas, causing leaching of soil pollutants.
C. Dioxin is buried in these areas.
D. Much manufacturing of industrial chemicals occurs in these areas.
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