Mammals have Toll-like receptors (TLRs) that can recognize a kind of macromolecule that is absent from vertebrates but present in or on certain groups of pathogens, such as viral _____
A) double-stranded DNA
B) double-stranded RNA
C) glycoproteins
D) phospholipids
B
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The C. burnetii, an acute systemic infection, primarily affects the lungs and can exist in two antigenic states. The reference method that is both highly specific and sensitive and is recom-mended for identification is:
a. immunofluorescent antibody (IFA). b. direct fluorescent antibody (DFA). c. Western blot. d. latex agglutination.
The first day of the menstrual cycle is marked
by
a. the beginning of ovulation. b. the onset of PMS. c. the beginning of menstruation. d. an increase in the thickness of the uterine lining. e. the beginning of the luteal phase
Which group is able to evolve?
A) individual cats in a home B) a population of asexually reproducing bacteria C) a rose bush D) an HIV virus that has infected a patient
Schwann cells are a type of neuroglia located outside of the brain.
Answer the following statement true (T) or false (F)