The change from negative serum, without antibodies specific to an infecting agent, to positive serum, containing antibodies against that infecting agent, is called
A. ELISA.
B. complement fixation.
C. seroconversion.
D.
serum reversion.
C
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Receptors for activated complement proteins are found on ____
a. dendritic cells, macrophages, and neutrophils b. mast cells, macrophages, and neutrophils c. dendritic cells, B lymphocytes, and neutrophils d. dendritic cells, eosinophils, and macrophages e. monocytes, T lymphocytes, and B lymphocytes
Speciation caused by a change in the course of
a river is an example of ____ speciation. a. divergent b. parapatric c. allopatric d. convergent e. sympatric
What is the hydrogen sulfide indicator in the Lysine Iron Agar?
A. Ferric ammonium citrate B. Sodium thiosulfate C. Bromocresol purple D. Ferrous sulfate
Which of the following is not associated with pneumonia?
A. An inhaled allergen B. Bacteria C. Virus D. Fungi E. Shortness of breath