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Question
The time interval required for the formation of two cells from one is called theA) generation time.
B) growth time.
C) growth rate.
D) division rate.
Answer
This answer is hidden. It contains 1 characters.
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Which of the following statements about chlamydial infections is TRUE?
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The Spanish flu of 1918 was caused by an ________ influenza virus.
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D) H2N2
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Diseases can be controlled through immunization even if the percentage of the population that is immunized is less than 100% because
A) vectors can be controlled through other means.
B) most diseases lack reservoirs.
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In just over a decade of efforts, the World Health Organization (WHO) eradicated smallpox by using worldwide
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In 2003, the majority of AIDS deaths occurred in
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C) Europe.
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The study of the occurrence, distribution, and determinants of health and disease in a population is the field of
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Filoviruses (such as Ebola virus) that cause severe hemorrhagic fevers generally have high ________ but low ________.
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B) prevalence / mortality
C) mortality / morbidity
D) morbidity / mortality
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Cholera is an example of a pandemic disease that
A) has multiple wild animal reservoirs and is thus difficult to eradicate.
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C) is spread through direct contact and has only a human reservoir.
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Influenza pandemics occur cyclically because
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B) new strains emerge due to reassortment between bird, swine, and human variants.
C) the vector is seasonal.
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B) can be virtually any pathogenic bacterium or virus.
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The arrangement of Class II MHC proteins in pairs or trimers enhances their stability.
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Which of the following is involved in B cell selection and tolerance?
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B) clonal deletion
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Clonal anergy is a state of
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B) high energy.
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An individual usually expresses ________ structurally distinct allele(s) that encode class I MHC proteins.
A) one
B) two
C) four
D) six