PrepTest 104, Section 3, Question 15
Homing pigeons can be taken from their lofts(451 more words not shown)
Which one of the following(8 more words not shown)
- AThe ability of(18 more words not shown)
- BIt is likely(22 more words not shown)
- CThe majority of(13 more words not shown)
- DThe mechanisms underlying(18 more words not shown)
- EThe homing ability(17 more words not shown)
Reading the passage
We've already predicted the main point: a map sense looks more promising than tracking the outward journey, but we still don't know how that sense works. Papi's smell-based version runs into problems. We need an answer that keeps both the favored explanation and the uncertainty.
Working the answers
- A
The focus is how pigeons get home, not proving their ability is unlike every other species'. Honeybees appear as an example of one possible mechanism, not as the start of a survey establishing pigeons' uniqueness.
- BCorrect
Paragraph 3 calls a map sense “more promising” while saying its nature “remains mysterious.” The criticism of Papi's proposal explains why naming a map sense hasn't yet solved the problem. This captures our prediction without pretending the mechanism has been established.
- C
The discussion raises problems with particular experiments and interpretations. It doesn't establish design flaws in a majority of experiments, and that claim would miss the central judgment about how pigeons navigate.
- D
This recommends a research strategy. The writer assesses what the existing evidence tells us; there's no claim that this combination of research settings is the best way forward.
- E
The short-range species illustrate tracking outward displacement. That is the alternative the writer calls unlikely, not the more promising map sense.
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