Pertussis has all of the following characteristics except
A. DTaP immunization will prevent it.
B. the early stage resembles a cold with nasal discharge and sneezing.
C. transmission is by respiratory droplets.
D. the catarrhal stage has persistent, hacking coughs with "whoops."
E. the pathogen has virulence factors to destroy the action of respiratory cilia.
Answer: D
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What will be an ideal response?
Microvilli serve to
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Which of the following refers to the area of Earth's surface that is required to sustainably support a particular level of development and consumption?
A. Demographic transition model B. Carrying capacity C. Ecological footprint D. Biosphere E. Ecological cohort
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