Which type of staphylococcus is more likely to cause uncomplicated urinary tract infections in non-hospitalized hosts, especially sexually active young women?
A. Staphylococcus saprophyticus
B. Staphylococcus aureus
C. Staphylococcus epidermidis
D. Staphylococcus intermedius
Ans: A. Staphylococcus saprophyticus
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Atrioventricular valves separate:
A. the left atrium from the left ventricle and the right atrium from the right ventricle. B. the right atrium from the right ventricle. C. the left atrium from the left ventricle. D. the right and left ventricles. E. the aorta from the left ventricle.
In which kind of climate do most bryophytes live?
a. Damp habitats b. Deserts c. Temperate forests d. The understory of tropical forests
Plate tectonic theory is based on
a. a thermal convection model in which cool material in the earth's mantle rises and spreads laterally beneath the crustal plates. b. the idea that the earth's crust is fragmented into rigid crusts that are sinking slowly beneath crustal plates. c. the idea that coacervate formation causes continents to drift apart slowly on their crustal plates. d. observations that the sea floor is slowly spreading away from oceanic ridges due to thermal convection in the mantle. e. all of these.
Influenza A strains are characterized by
A) the type of animal in which the strain originated. B) whether or not humans are infected. C) the country in which the strain originated. D) whether the virus contains DNA or RNA. E) the type of HA and NA spikes found on the viral surface.