Legionellosis transmitted by a grocery store mist machine is an example of
a. Direct contact.
b. Droplet transmission.
c. Fomite.
d. Vector.
e. Vehicle transmission.
Answer: e. Vehicle transmission.
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The organism that exhibits characteristic end-over-end tumbling motility when incubated in nutrient broth at room temperature for 1 to 2 hours is:
a. L. monocytogenes. b. Corynebacterium diphtheriae. c. Bacillus anthracis. d. Bacillus cereus group
Which cells are located in the brain and spinal cord of vertebrates?
a. interneurons b. motor neurons c. afferent neurons d. efferent neurons e. afferent and efferent neurons
What is a function of the sympathetic nervous system?
a. Dilating the bronchi b. Slowing the heart rate c. Stimulating bile secretion d. Causing the bladder to contract
Which hormone stimulates both leaf abscission and fruit ripening?
a. abscisic acid b. auxin c. cytokinin d. ethylene e. gibberellin