The primary immune response can take up to ____ for the antibody to peak, whereas the secondary immune response can take up to _____ for the antibody to peak.

What will be an ideal response?


7-14 days; 3-5 days

Biology & Microbiology

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Keystone predators can maintain species diversity in a community if they _____

A) competitively exclude other predators B) prey on the community's dominant species C) allow immigration of other predators D) reduce the number of disruptions in the community E) prey only on the least abundant species in the community

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The best-known examples of viruses that cause latent infections are

A. polio. B. herpes. C. measles. D. chickenpox. E. herpes AND chickenpox.

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Resident flora of the skin tends to fluctuate over time.

A) True B) False

Biology & Microbiology

A child has a history of recurring serious bacterial infections. A blood sample shows lymphocyte levels are a little below normal, and no antibodies to the pathogens are detected in serologic tests. Based on this information, which of the following is the likeliest diagnosis for this child?

A) Bruton-type agammaglobulinemia B) Grave's disease C) severe combined immune deficiency (SCID) D) systemic lupus erythematosus (SLE) E) hemolytic disease of the newborn

Biology & Microbiology