PrepTest 105, Section 3, Question 6
Until recently, many biologists believed that invertebrate "schools"(448 more words not shown)
It can be inferred from(20 more words not shown)
- Atry to stay(11 more words not shown)
- Bbe more likely(8 more words not shown)
- Cbe unlikely to(4 more words not shown)
- Dtry to follow(11 more words not shown)
- Etry to confuse(7 more words not shown)
Reading the passage
Why join a group whose members are running out of food and eating the young? The ending connects increasing numbers with food scarcity and possible cannibalism. Then it tells us that animals leave when a school exceeds its optimal size.
What we’re looking for
We haven't been told directly what a newcomer does. But if those conditions drive existing members elsewhere, it's reasonable to predict that a newcomer would be unlikely to join.
Working the answers
- A
Some mysids circle to the back to obtain food unnoticed. That doesn't tell us a newcomer encountering this overcrowded school would stay at its edge.
- B
The adults eat the young. Being fully grown isn't described as making an animal more likely to be eaten.
- CCorrect
The newcomer would be unlikely to join that particular school. The support comes from the food pressure and the members' response: when optimal size is exceeded, some “will join another school.” C extends that avoidance to an arriving animal. It's a reasonable inference about this situation, not a directly stated observation of newcomers.
- D
Following at the back to escape predators isn't described. The back-of-school detail concerns obtaining food.
- E
The complex swimming maneuvers confuse predators. This changes the target to the school's own members and gives no reason the newcomer would try to confuse them.
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