Blood agar is often used to differentiate between
A) salt sensitive and non-salt sensitive microbes.
B) bacteria that absorb oxygen and those that do not.
C) types of hemolysis the bacteria may produce.
D) all of the above.
Ans: C) types of hemolysis the bacteria may produce.
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Which public health measure(s) is/are MOST effective against pathogens transmitted through common vehicles?
A) water purification B) mosquito control C) food safety regulations D) water purification and food safety regulations
Vascular plants hydrate photosynthetic cells using _________, whereas bryophytes do soVascular plants hydrate photosynthetic cells using _________, whereas bryophytes do so using _____________
A. surface water; soil water B. soil water; surface water C. xylem; phloem D. xylem; surface water
In arid terrestrial environments, salt can accumulate in the soil because of
A. the selective uptake of water by plants. B. the activities of grazing animals. C. the precipitation of salt from dry air. D. the secretion of salt by plants. E. the settlement and evaporation of water.
There are no direct-to-consumer genetic tests available that screen for breast cancer susceptibility
a. True b. False