PT148.S4.Q7 > 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

SECTION 2 · 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

PASSAGE 4

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

SECTION 3 · lr

SECTION 4 · lr

The author hypothesizes that urushiol (the chemical that causes poison ivy and poison oak reactions) did not evolve as a chemical defense for these plants. This is based on the observation that, while some animals have a mild urushiol reaction, the reaction is not severe in any animals other than humans. Furthermore, wood rats use urushiol-producing plants for nest material.

The author also assumes that the mild skin reactions caused by urushiol don’t deter animals. The author also assumes that urushiol could not have originally evolved as a chemical defense in the plants that produce it, even if it’s no longer effective.

This is irrelevant, since it does not provide any additional information about the effects of urushiol and whether it likely evolved as a chemical defense. For one thing, we don’t know if live or dead branches have different urushiol content.

This strengthens the hypothesis, since it affirms the author’s assumption that any mild reaction caused by urushiol doesn’t deter animals from using it.

This is irrelevant, since the argument only makes claims about urushiol based on observations specific to urushiol; whether chemical defenses are common in other plants doesn’t matter.

This is irrelevant, since the argument has already established that urushiol is harmful to humans. We primarily care about how it affects animals.

The growth of urushiol-producing plants in human-altered ecosystems is irrelevant to the hypothesis that urushiol did not evolve as a chemical defense in those plants.

PrepTest 148 - Section 4 - Question 7

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