Vaccines can contain all of the following EXCEPT
a. a killed pathogen.
b. a weakened pathogen.
c. noninfective fragments of a pathogen.
d. an unmodified antigen.
e. inactivated bacterial toxins.
Answer: d
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One of the most pathogenic hemorrhagic fever viruses belongs to the _________ family
a. Filoviridae b. Flaviviridae c. Papovaviridae d. Picornaviridae
The concentration of carbon dioxide in the
atmosphere is four molecules for each __________ molecules of air. a. 100 b. 1,000 c. 10,000 d. 100,000 e. 1,000,000
A Mendelian test cross is used to determine whether
A) an individual is homozygous or heterozygous. B) an allele is dominant or recessive. C) segregation or independent assortment is occurring. D) the genotype or phenotype is more important. E) the flowers are purple or white.
Cultural differences have no effect on the way an international firm conducts its business around the globe.
a. true b. false