PrepTest 104, Section 2, Question 20
Many birds that form flocks compete through aggressive(453 more words not shown)
The passage suggests that among(19 more words not shown)
- Adark throat(1 more words not shown)
- Bgreater-than-average body(1 more words not shown)
- Coffspring of high(1 more words not shown)
- Dstrong fighting(1 more words not shown)
- Efrequent(1 more words not shown)
Reading the passage
What did high status mean before we got into the different species? The first paragraph connects status to fighting ability and gives higher-status birds priority over resources. Those are the relationships we actually know. A trait that merely seems useful to a strong bird still needs support.
Working the answers
- A
Dark throats belong to the discussion of Harris sparrows. They aren't established as a general trait of high-status flocking birds; the titmouse evidence concerns a breast stripe instead.
- B
A heavier bird might seem like a better fighter, but the text doesn't establish that high-status birds have above-average body weight.
- C
We aren't told anything about their offspring's status.
- DCorrect
Each bird gains status “related to its fighting ability.” High status therefore points toward strong fighting ability, which is the reason a visible signal of that ability could matter to rivals.
- E
Fighting carries a risk of injury, but high status doesn't establish frequent injuries. A recognizable signal could reduce the need to fight at all—that's the advantage introduced in paragraph 1.
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