Suppose that your diet does NOT contain any dark green vegetables, whole grains, yeast, or lean meats. Which vitamin might you be deficient in?
a. B1
b. folic acid
c. B6
d. niacin
Ans: b. folic acid
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No matter what model is used to show community succession, the final stage is always
A. a climax community. B. a secondary community. C. a sere. D. a resilient community.
The ________ law of thermodynamics states that energy can be neither created nor destroyed.
A. fourth B. second C. first D. third
Which of the following is not a function of activated complement proteins?
a. lysis of pathogens b. enhancing inflammation c. coating pathogens to enhance phagocytosis d. attraction of white blood cells to infection sites e. decreasing capillary permeability to minimize edema
Which portal of entry is the most commonly used by pathogens?
A. gastrointestinal B. urogenital C. skin D. respiratory E. They are all equally used as portals.