The most common route of central nervous system invasion by pathogens is through
A) the skin.
B) the circulatory system.
C) the gastrointestinal system.
D) the parenteral route.
E) direct penetration into nerves.
B
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The symptoms of malaria are:
A. jaundice B. abdominal cramps C. diarrhea and dehydration D. headaches and nausea E. alternating chills and fever
A scientific name consists of which of the following?
I. family name II. genus name III. species name
a. I only b. II only c. III only d. I and II e. II and III
Which one of the following enables T helper cells to stimulate and activate other cells of the immune response?
A) interferon B) cytokines C) antibodies D) complement E) histamine
Assuming independent assortment for all gene pairs, what is the probability that the following parents, AABbCc × AaBbCc, will produce an AaBbCc offspring?
A) 1/2 B) 1/16 C) 1/8 D) 3/4