1. A factor or agent which increases the risk of cancer is known as a a. teratogen b. mutagen c. carcinogen d. fomite - carcinogen 2. The four major causes of death among all age groups of Americans include all of the following except. a. homicide b. accidents c. malignant neoplasms d. heart disease - homicide 3. In recent years, the largest number of rabies cases were associated with a. skunks b. bats c. dogs d. raccons. - skunks 4. Asbestosis is caused by fine silicate fibers retained in the a. kidneys b. lungs c. colon d. abdomen - lungs 5. An illness due to a specific infectious agent or its toxic product which is transmitted from a reservoir to a susceptible host either directly or indirectly is called a. an infectious disease b. a communicable disease c. a genetic disease d. a noncommunicable disease - a communicable disease 6. Rocky mountain spotted fever is spread by a. flies b. spiders c. cockroaches d. ticks - ticks 7. Mycotoxins are poisonous chemicals produced by

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