PT154.S2.Q3 > Question

SECTION 1 · lr

Question 1 Question 2 Question 3 Question 4 Question 5 Question 6 Question 7 Question 8 Question 9 Question 10 Question 11 Question 12 Question 13 Question 14 Question 15 Question 16 Question 17 Question 18 Question 19 Question 20 Question 21 Question 22 Question 23 Question 24 Question 25 Question 26

SECTION 2 · lr

SECTION 3 · rc

PASSAGE 1

Question 1 Question 2 Question 3 Question 4 Question 5 Question 6

PASSAGE 2

Question 7 Question 8 Question 9 Question 10 Question 11 Question 12 Question 13

PASSAGE 3

Question 14 Question 15 Question 16 Question 17 Question 18 Question 19 Question 20

PASSAGE 4

Question 21 Question 22 Question 23 Question 24 Question 25 Question 26 Question 27

SECTION 4 · lr

The population of horses peaked 25,000 years ago during a cold period, and then rapidly declined during a warming period.

The correct answer will explain why the horse population peaked and declined in correlation with global temperatures. This explanation will likely show that the cooler period was favorable for horses, while the warming period was in some way difficult for horses. Since the stimulus states that horses thrive in grasslands, the explanation may involve how grasslands respond to warming and cooling.

We’re talking about grassland-dwelling modern horses, not their forest-dwelling ancestors, so this doesn't help us. This also doesn't tell us whether size impacts horses’ ability to withstand cooling and warming.

So at least one kind of horse thrives in cold grasslands. We already know from the stimulus that horses prefer grasslands, and this doesn't explain how temperature changes affect horses' survival.

Like in (B), we already know that horses like grasslands. But it doesn't help us to explain why horses peaked during a cool period. It doesn’t matter if some horse relatives thrive in warm climates.

Horses thrive in grasslands. Cold periods provide horses with ample habitats, while warmer periods turn grasslands into forests. This explains why horses peaked during a cold period and declined rapidly during a warm one.

We've already established that these cycles occur, and this detail doesn't give us more useful information about the horse population changes 25,000 years ago.

PrepTest 154 - Section 2 - Question 3

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