Most pathogens that gain access through the skin
A) can penetrate intact skin.
B) just infect the skin itself.
C) enter through hair follicles and sweat ducts.
D) must adhere first while their invasive factors allow them to penetrate.
E) must be injected.
C
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In the rumen, the carbohydrate fermentation end products include
A. methane. B. acetate. C. carbon dioxide. D. All of the choices are correct.
Gap junctions in plant cells can close
a. true b. false
In humans, the allantois:a
stores embryonic nitrogenous wastes. b. eliminates nitrogenous wastes from the embryo. c. contributes to the formation of the blood vessels in the umbilical cord. d. secretes amniotic fluid. e. serves as a temporary center for formation of blood cells
Chlorine dioxide and ethylene oxide are gaseous sterilants.
Answer the following statement true (T) or false (F)