Sometimes there is no more effective means of controlling an agricultural pest than giving free rein to its natural predators. █ ████ ██ █████ ██ ███ ████████ █████ █ ████ █████ ██████████ ███ ██ ███████████ ██████████ ██ █ █████████ ████ ██ ███ █████ █████████████ ███
Intro topic ·Controlling cyclamen mites using Typhlodromus mites
Reasons 3 and 4 ·Reproductive timing and alternative sources of food
Reason 3: Typhlodromus only reproduces when cyclamen prey is available.
Reason 4: Typhlodromus has other food sources, allowing it to survive when cyclamen mites are scarce.
Again, correlation between presence of Typhlodromus and lower cyclamen populations
Passage Style
Problem-analysis
Single position
22.
Which one of the following ██ █████████ ██ ███ ███████ ██ █ ██████ ████████████ ██ ███ █████████████ ██ ████████████ ██ █ █████████
Question Type
Stated
The correct answer will be mentioned in P2, which describes features that contribute to the Typhlodromus’s effectiveness as a predator of cyclamen.
a
its ability to █████████ ████ ████████████ ██████ █████████
Not mentioned. We’re never told Typhlodromus can withstand “most” insecticides except parathion.
1%
b
its lack of ███████ █████████ ██ ██████████ ██████
Not mentioned. We’re never told about the presence of absence of predators of Typhlodromus in strawberry fields.
1%
c
its ability to ████ ██ █████████ ████████ ██ █████████ ██████████ ███████
Not mentioned. We’re never told Typhlodromus can survive in different climates in different regions. We know they can survive in the winter, but this doesn’t imply an ability to survive in different climates in different regions.
2%
d
its constant food ██████ ██ ████████ ████ ███████████
Not mentioned. Actually there isn’t a constant supply of cyclamen for food, because cyclamen population drops in the winter.
3%
e
its ability to ███████ ████ ███ ████ ███ █████████
Stated in the middle of P2.
93%
Difficulty
93% of people who answer get this correct
This is a slightly challenging question.
It is significantly easier than other questions in this passage.
CURVE
Score of students with a 50% chance of getting this right
25%137
144
75%151
Analysis
Stated
Stated
Stems asking us to identify an idea that appears explicitly in the passage (as opposed to ideas that are merely implied).
Passages that present a particular problem and then discuss the implications of that problem. They also often explore one or more solutions to that problem (although they don’t have to).
