PrepTest 124, Section 4, Question 27
Sometimes there is no more effective means of(444 more words not shown)
Information in the passage most(8 more words not shown)
- AStrawberry crops can(15 more words not shown)
- BFor control of(22 more words not shown)
- CFactors that make(16 more words not shown)
- DWhen Typhlodromus is(21 more words not shown)
- EStrawberry growers have(16 more words not shown)
Reading the passage
We know what happened with predators present and absent, and why the relationship can keep pest numbers down. This is an open support question, so let's test the actual claims rather than add a new rule about all predators or all farming practices.
Working the answers
- ACorrect
The first paragraph says the predators keep cyclamen mites from reaching “significantly damaging levels.” Both populations can therefore be present without significant crop damage. Controlling a pest doesn't require wiping it out, and no significant damage is a narrower claim than no damage of any kind.
- B
Both mites happen to reproduce by parthenogenesis. That doesn't establish that every effective mite predator must share its prey's mode of reproduction. The account explains features of this relationship, not a universal requirement.
- C
No other strawberry pests are assessed. Being effective against cyclamen mites doesn't establish effectiveness against those unspecified pests.
- D
The timing doesn't support a first-year pesticide need. Cyclamen populations don't reach significantly damaging levels until the second year, when Typhlodromus usually arrive. The gap D seems to worry about isn't established.
- E
The experiments show what happens when parathion removes the predators. They don't tell us that strawberry growers have actually used it indiscriminately or caused this history of pest problems. A demonstrated effect isn't evidence that those growers produced it.
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