In which of the following situations did disease develop due to vertical transmission of the pathogen?
A. A dog develops rabies after being scratched during a fight with a raccoon that carries the virus
B. A hospitalized patient develops MRSA bacteria in a wound following surgery
C. A traveler develops gastroenteritis after drinking water that is contaminated with Escherichia coli bacteria
D. A fetus develops listeriosis after unpasteurized cheese infected with Listeria bacteria is consumed by the mother during pregnancy
Answer: D
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An ecologist that studies the distribution of a frog species along a latitudinal gradient is performing
a(n)_______.
a. observational experiment b. manipulative experiment c. predictive experiment d. lab experiment e. modeling experiment
What effect is warming predicted to have on migration behavior?
A) Birds will depart for migration earlier and return later. B) Birds will depart for migration later and return later. C) Birds will depart for migration earlier and return earlier. D) Birds will depart for migration later and return earlier.
Flatworms have simple kidneys consisting of tubular structures called nephridia
Indicate whether the statement is true or false
Which of the following groups of drugs can become incorporated into the bones and teeth of a fetus?
A) beta-lactams B) aminoglycosides C) quinolones D) tetracyclines E) sulfonamides