PrepTest 120, Section 2, Question 25
Until recently, biologists were unable to explain the(439 more words not shown)
The passage implies that which(15 more words not shown)
- AThey immobilize their(16 more words not shown)
- BThey cannot survive(14 more words not shown)
- CThey cannot reproduce(16 more words not shown)
- DThey cannot survive(12 more words not shown)
- EThey produce thousands(5 more words not shown)
Reading the passage
Rhinoviruses need physical proximity to reach another host. In the example, a solitary infected person becomes too sick to leave home, cutting off opportunities to pass the virus along. My first prediction is about this obstacle to spreading. Now we need to see what makes the obstacle especially costly for the virus.
Working the answers
- A
The problem isn't that the virus has no chance to reproduce extensively. The example expressly allows thousands of new viruses to be produced. They fail to reach new hosts, not to reproduce in the first place.
- BCorrect
I might initially focus only on the person staying home and overlook survival time. But the second paragraph says the newly produced viruses will not survive long enough to reach another host, and the final paragraph puts their average life span at hours. They can't wait outside the host long enough for another opportunity in the way the sit-and-wait pathogens can.
- C
This invents a vector-transmission problem. Rhinoviruses are the direct-transmission example, and the text doesn't attribute their limited virulence to insufficient numbers for vectors.
- D
Again, no vector pickup is involved in this explanation. The issue is reaching a nearby new host before the virus dies.
- E
Producing thousands of new viruses is part of the example, but that fact alone doesn't explain limited virulence. The important part is what happens next: those viruses die before being passed along.
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