Important sources of contamination in crowded locations are

A. blood.
B. droplets of saliva or mucus.
C. restrooms.
D. kitchens.


B

Biology & Microbiology

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One weakness of the Articles of Confederation was the inability of the central government to

A: establish a postal system B: collect adequate taxes from the states C: control western lands D: admit new states to the Union

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Daptomycin requires free calcium for its antibacterial action, is inhibited by pulmonary surfactant, and has activity against gram-positive bacteria. Gram-positive bacterial isolates can be tested for daptomycin susceptibility. For which type of infection should daptomycin susceptibility NOT be reported?

a. Bacteremia b. Meningitis c. Pneumonia d. Skin/Soft tissue infection

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Mussels and sponges sometimes contain methanotrophs as intracellular symbionts because the methanotrophs

A. allow the partnership to use hydrogen sulfide as a source of electrons. B. remove otherwise toxic levels of methane from the environment. C. convert methane to carbohydrate for use by the host. D. All of the choices are correct.

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