There are an estimated __________ deaths per year
in the United States from lung cancer among
nonsmokers who associate with smokers.
a. 1,000
b. 1,500
c. 2,000
d. 2,500
e. 3,000
Answer: e
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Which of the following statements are true about enzymes, except:
The incidence of HIV/AIDS among transfusion recipients has
A) increased since the discovery of HIV. B) decreased since the discovery of HIV. C) remained the same since the discovery of HIV. D) never been more than a few individuals per year.
The founder effect differs from a population bottleneck in that the founder effect ________.
A. is a type of natural selection B. can occur only on an oceanic island colony C. involves the isolation of a small colony of individuals from a larger population D. requires a small population
Antigens are
A. chemicals that enhance all lymphatic organs. B. foreign molecules to which white blood cells can bind through specialized receptors, leading to the proliferation of lymphocytes. C. proteins produced by plasma cells that stimulate the clotting of blood. D. proteins produced by virus-infected cells that stimulate an immune response.