PT137.S4.Q23 > Question

SECTION 1 · rc

PASSAGE 1

Question 1 Question 2 Question 3 Question 4 Question 5 Question 6 Question 7

PASSAGE 2

Question 8 Question 9 Question 10 Question 11 Question 12 Question 13 Question 14

PASSAGE 3

Question 15 Question 16 Question 17 Question 18 Question 19

PASSAGE 4

Question 20 Question 21 Question 22 Question 23 Question 24 Question 25 Question 26 Question 27

SECTION 2 · 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

SECTION 3 · lr

SECTION 4 · lr

Why have the populations of P-plankton, fish X, fish Y, and fish Z, all gone down recently, even though no other species in the ecosystem has experienced a decrease in population?

The correct answer should tell us about something recent and harmful to P-plankton, fish X, fish Y, and fish Z. The correct answer should not be something that we would expect to kill members of other species.

The dumping has been going on for “many” years, so it wouldn’t explain a recent decrease in population. Also, we’d expect the harmful effects of dumping to damage other species, too, in addition to P-plankton, fish X, fish Y, and fish Z.

This is something harmful to P-plankton, fish X, fish Y, and fish Z. Note that this bacteria is a “new” strain, which helps explain why the decreased population occurred recently.

This doesn’t explain why populations of the fish have gone down recently.

This tells us how loss of P-plankton affects the fish. But it doesn’t explain why the P-plankton population decreased recently.

We’d expect harmful effects of global warming, if any, to affect other species in addition to P-plankton, fish X, fish Y, and fish Z.

PrepTest 137 - Section 4 - Question 23

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