M. pneumoniae is detected as the most common agent of lower respiratory tract infection among:
a. previously healthy patients 2 months to 5 years of age.
b. adults younger than 30 years of age.
c. community-acquired pneumonia in adults.
d. school-age children.
B
The most common agent of lower respiratory tract infection among young adults is M. pneumo-niae, which is transmitted via close contact.
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Erythema migrans is associated with typhus
Indicate whether the statement is true or false.
PBDEs are ____
a. permitted in many European countries but banned in the United States b. permitted in only one European country and in only 11 states in the United States c. banned worldwide but are still being used illegally d. banned in many European countries but permitted in most states in the United States e. banned in many Europeans countries and all states in the United States
In a hypertonic environment, an animal cell will do which if the following?
a. swell b. stay the same size c. shrink d. cannot be determined
Two solutions are separated by a selectively permeable membrane. Solution A has a higher concentration of solute (dissolved substances) than Solution B. Therefore, solution B will exert more osmotic pressure on its side of the membrane.
a. true b. false