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Question
Provide a reason for the ecological importance of pelagic Bacteria and Archaea.Answer
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A) gonorrhea.
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Which disease causes over 1.6 million deaths per year worldwide, which is approximately 11% of all deaths related to infectious diseases?
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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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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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The study of the occurrence, distribution, and determinants of health and disease in a population is the field of
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A) incidence / prevalence
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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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
C) clonal anergy and 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.
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C) four
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