Reading ComprehensionDifficulty: Medium

PT126 S2 P2 Q13 Explanation

Purple Loosestrife

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Passage

The following passages concern a plant called purple loosestrife. Passage A is excerpted from a report issued by a prairie research a journal of sociology.

Passage A Purple loosestrife (Lythrum salicaria), an aggressive and invasive perennial of Eurasian origin, arrived with settlers in eastern North America in the early 1800s and has spread across the continent’s midlatitude wetlands. The impact of purple loosestrife on native vegetation has been disastrous, with more than 50 percent of the biomass but no measure of the impact of this herbicide on native plant communities has been made.

With the spread of purple loosestrife growing exponentially, some form of integrated control is needed. At present, coping with purple loosestrife hinges on early detection of the weed’s arrival in areas, which allows local minimum damage to the native plant community.

Passage B The war on purple loosestrife is apparently conducted on behalf of nature, an attempt to liberate the biotic community from the tyrannical influence of a life-destroying invasive weed. Indeed, purple loosestrife control is portrayed by its practitioners as an environmental initiative intended to save nature rather than control it. Accordingly, according to the scientific community, and all of nature suffers under its pervasive influence.

Regardless of the perceived and actual ecological effects of the purple invader, it is apparent that popular pollution ideologies have been extended into the wetlands of North America. Consequently, the scientific effort to liberate nature from purple loosestrife has failed to decouple itself from its philosophical origin as an instrument to control hunting, trapping, and recreation revenues due to a decline in the production of the wetland resource.

What this question is testing

Strengthen

Your task

Find the choice that makes the argument's conclusion more likely to be true.

Common trap

Answers that are consistent with the argument but add no real support, or that strengthen a claim the argument doesn't make.

Winning move

Locate the gap between evidence and conclusion, then pick the choice that closes it.

Reading along? Open the full official question in LawHub — we show a fragment here and keep the reasoning in our own words.

The question
13.

Which one of the following, if true, would cast doubt on the argument in passage B but bolster the

Answer choices

  1. Correct78% picked this

    Localized population reduction is often a precursor to widespread endangerment of

    Why this is right

    This definitely helps us argue that purple loosestrife is scary and should be stopped. Passage B was downplaying the risk by saying that the impact of purple loosestrife has been pretty minimal so far. Only the canvasback has been identified as endangered by purple loosestrife. It may be negatively impacting furbearing mammals, but none of them can be considered threatened in North America. This answer is saying, "sure, it's not dire yet across the whole North American continent, but a local population reduction often comes just before widespread endangerment of a species. So if we do nothing than pretty soon this local population reduction could balloon into widespread endangerment." This helps A's alarmist point of view.

    Skill tested: Strengthen · how this choice captures the passage's function is the move to repeat next time.

  2. Strengthens Passage B2% picked this

    Purple loosestrife was barely noticed in North America before the advent of suburban sprawl

    Because this sounds like it's downplaying the severity of loosestrife (it was barely noticed), this answer is working more towards supporting B's position.

  3. Strengthens Passage B11% picked this

    The amount by which overall hunting, trapping, and recreation revenues would be reduced as a result of the extinction of one or more species

    This is saying that if loosestrife were to mess up some of the species that are hunted and trapped, it would significantly hurt the hunting industry. This strengthens B's position that the main reason people are being hysterically worried about loosestrife is because they're worried about losing out on revenues from hunting and trapping.

  4. Strengthens Passage B6% picked this

    Some environmentalists who advocate taking measures to eradicate purple loosestrife view such measures as a

    Passage B claimed that "the scientific effort to liberate nature from purple loosestrife is still connected to its philosophical origin as an instrument to control nature to the satisfaction of human desires." This answer choice is supporting that point, because it's talking about people who are trying to eradicate loosestrife because of their philosophy of controlling nature.

  5. Strengthens Passage B3% picked this

    Purple loosestrife has never become a problem in its native habitat, even though no effort has been made

    Passage A wants to eradicate loosestrife before it becomes a problem. Passage B's position is that we don't need to worry about loosestrife, so this is supporting B by saying that "even where it grows naturally and no attempt is made to eradicate it, it's never become a problem."

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