PrepTest 104, Section 3, Question 21
Homing pigeons can be taken from their lofts(451 more words not shown)
Given the information in the(29 more words not shown)
- AThe map sense(10 more words not shown)
- BThe mechanism regulating(14 more words not shown)
- CThe homing ability(10 more words not shown)
- DThe experiments conducted(17 more words not shown)
- EThe experiments conducted(16 more words not shown)
Reading the passage
They disagree about smell, but agree on the broader possibility of a map sense. Papi offers an olfactory version of that map. The writer finds a map sense promising while questioning his particular explanation of how it works. That's the level at which I'd look for agreement.
Working the answers
- A
This is Papi's view, but the writer challenges it. The nostril-plugging results could reflect distress, and other experiments block smell without disrupting orientation.
- B
Honeybees illustrate outward-displacement tracking, the alternative to a map sense. That isn't the account these two favor.
- CCorrect
Papi's theory is a kind of map sense, and paragraph 3 calls a map sense “more promising.” They can agree on that general explanation without agreeing that odors provide the map.
- D
No one ranks Papi's experiments as the most valuable evidence collected. The writer instead questions what their results establish about smell.
- E
Schmidt-Koenig and Phillips's result is introduced as “one problem with the hypothesis.” The writer treats it as a reason for doubt, so we can't attribute agreement that it hasn't substantially weakened Papi's theory.
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