PT143.S3.Q6

SECTION 1 · lr

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SECTION 2 · 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
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PASSAGE 4
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SECTION 3 · lr

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SECTION 4 · lr

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PrepTest 143 - Section 3 - Question 6

Question

Explanation

Analytics

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Support If newly hatched tobacco hornworms in nature first feed on plants from the nightshade family, they will not eat leaves from any other plants thereafter. ████████ ███████ █████████ ████ ████ ██ █████ █████ ██ ██████ ██ ████ ████ ██ ██████ █████ ████ ███████████ ████ █████ █████████ ██ ███████ ████ █████████ ██████████ ███████████ ████ ████ █ ██████████ █████ ████ ██ ████ █ ███████████ ███ █████ █████████ ██████ ██████████ ██ ███ ████████ █████████ ██ █████ ██ █████ ████ ██ ████████████ ███ █████ ████ ███████████ ███████ ███████ █████████ █ ██████ █████

Summarize Argument: Phenomenon-Hypothesis

Scientists hypothesize that when a hornworm’s first meal is from a nightshade, its taste receptors become habituated to indioside D, and afterward anything without indioside D doesn’t taste good. This is based on the fact that newly hatched hornworms that first feed on nightshades don’t eat leaves from non-nightshades afterward, whereas newly hatched hornworms that first feed on non-nightshades are open to eating non-nightshades afterward.

Notable Assumptions

The author assumes that there isn’t another explanation for the observed diet patterns of hornworms. For example, what if there’s some other chemical besides indioside D that might be the reason hornworms that eat nightshades prefer nightshades and don’t eat non-nightshades? Or what if the hornworms don’t necessarily care about the taste of nightshades, but become physically addicted to it, without regard to taste?

Analysis by KevinLin

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Which one of the following, ██ █████ ████ ███ ████ ███████ ███ ███ ███████████

Tobacco hornworms that █████ ███ ██ ██████████ ██████ ████ ██ ██████████ ███ ███ ███ ███████ ██ ██████████ █████ ████ ███ ██████

We’re concerned with the consumption of nightshades vs. non-nightshades. Preferences or the lack of preferences within the nightshades has no clear impact.

If taste receptors ███ ███████ ████ ███████ █████████ ████ █████ ███ ██ ██████████ ███████ █████ █████████ ████ ████████████ ████ ██ █████ ███████

This corroborates the theory that taste receptors are part of the explanation for the observed diet patterns.

Plausibility

Tobacco hornworm eggs ███ ████ ████████ ████ ██ ██████████ ███████

Where the eggs are laid has no clear impact. We’re concerned with the diet patterns of newly hatched nightshades and what explains the distaste for non-nightshades among the worms that first feed on nightshades.

Indioside D is ███ ███ ████ ████████ ████ ██████ ████ ██ ██████████ ███████

This weakens the argument by suggesting there may be another chemical responsible for the worms’ preference for nightshades after first feeding on nightshades.

The taste receptors ██ ███ ███████ ████████ ████ █████████████ █████████ ██ ███████ █████████ █████████ ██████████

This doesn’t help connect taste receptors to habituation to nightshades or to the chemical indioside D. We also don’t know the significance of a “physiological reaction.” Does that mean the worms can taste chemicals? We don’t know.

Difficulty

Question

94% of people who answer get this correct

This is a slightly challenging question.

CURVE

Score of students with a 50% chance of getting this right

25% 128

137

75% 146

Analysis

Question Stem Tags

Strengthen

Stimulus Tags

Causal reasoning

Correlation

Phenomenon-hypothesis (LR)

Answer Popularity

Popularity Avg. score

157

94%

164

Plausibility

146

153

156

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