Reading comp PrepTest 156 · Section 1 · Question 5

Passage

 Because most agricultural practices in North America produce row after row of only a few, genetically identical, varieties of crops, Remaining source text redacted.
Passage walkthrough
Passage Summary

Topic:
Science/Social Science

Paragraph 1
  • Paragraph note
    • Problem/Solution and Old Approach/New Approach
  • Views, minor Meta-Structures, and the author's attitude
    • Problem: North American agri practices are eroding the genetic base of crops, making them less durable (pests/disease)
    • Solution/New Approach: Look into indigenous farmers (practices, heirloom varieties of crops)
    • Old Approach: Focus on agricultural methods brought to North America from elsewhere


Paragraph 2

  • Paragraph note
    • Study/Examples of better practices by indigenous farmers
  • Views, minor Meta-Structures, and the author's attitude
    • Study: Indigenous farmers used genetics to make varieties
    • Example: Hybridization — Lots of varieties of (list of crops) that resisted disease/pests
    • Example: Make crops for local environments, less dependent on irrigation


Paragraph 3

  • Paragraph note
    • Process of maintenance; new wrinkle on problem
  • Views, minor Meta-Structures, and the author's attitude
    • Process: Regional exchange networks for seeds; oral tradition for methods
    • Problem: World market economy leading to these practices and varieties being lost, so need to protect ASAP


Main Point:

Because mass farming practices have harmed crop durability, it's important to turn to indigenous farmers' practices to protect the genetic base of crops, especially as the world market is starting to cause these practices to be lost.

Key Lines (P(aragraph)#, S(entence)#)?

P1, S1 - The problem
P1, S2 - One solution
P1, S3 - The Old and New Approaches
P2, S2 - An example is introduced
P2, S4 - Another example
P3, S1 - Processes by which the solution has worked
P3, S2 - A new wrinkle to the problem
Meta-Structure?



Problem/Solution: The opening sentence here introduces what is clearly a problem: the increasing susceptibility of food crops to pests and disease due to current agricultural processes. From this, we should expect the author to bring up a solution, or a variety of solutions. The author does so explicitly in the second sentence — looking to the "store of agricultural knowledge" held by indigenous farmers and the heirloom crops they work with. While the author calls this only a "possible" solution, the rest of the passage describes why this knowledge and these crop varieties can solve the problem, which suggests the author has at least some faith in the solution. In a Problem/Solution passage where the author supports a particular solution, the solution is the main point, reflected in our summary above.

Old Approach/New Approach: In Paragraph 1, Sentence 3, the author brings up Old and New Approaches used by crop geneticists to preserve the genetic base of crops. The Old Approach focused on studying "solely" agricultural methods brought to North America from elsewhere. These approaches aren't mentioned again. The New Approach is to study the methods and varieties of crops produced by indigenous farmers, which is the solution/main point. So this Meta-Structure informs the main point, but it isn't the central Meta-Structure that defines the passage. Expect a question or two on this Meta-Structure, but we shouldn't eliminate main point answer choices simply because they don't reference the old approach.

Last Thoughts?

This is a fairly straightforward passage as far as information, structure, and Meta-Structures are concerned, so let's head to the questions!

Question prompt

The information in the Remaining source text redacted.
Why the credited answer is right

Credited answer: D

The notes below walk through why it fits the stem and how to eliminate the rest.

Question Type

Science

Answer choices

  1. A
    Revitalizing seed exchange networks Remaining source text redacted.
    Why choice A is not credited
    (P3, S1; P3, S3) First, this answer choice doesn't line up with the main point of the passage, as it talks about preserving indigenous culture rather than preserving the genetic base of North American crops through indigenous practices and heirloom crops. Specifically, the author never states that bringing back these practices and heirloom crops will preserve an "essential" part of traditional indigenous culture.
  2. B
    The heirloom crops of Remaining source text redacted.
    Why choice B is not credited
    (P1, S2) The author brings up the use of heirloom crops as a possible solution, not the only possible one. This answer choice is too strong.
  3. C
    North American farmers have Remaining source text redacted.
    Why choice C is not credited
    (P1, S1; P3, S3) This answer choice is about North American farmers, not necessarily indigenous ones. We know North American farmers caused the problem by using these commercial crop varieties, so it's wrong to say that they have never used non-heirloom, commercial crops. Even if we interpret "North American" to refer only to indigenous farmers, the wrinkle to the problem raised by the author in Paragraph 3 shows that this group is also shifting to commercial crops due to the pressures associated with the world market economy. So this answer choice contradicts much of the passage.
  4. D
    Maintaining many varieties of Remaining source text redacted.
    Why choice D matches the stem

    Question Type:
    Must Be True

    Strategy Overview:
    Remind ourselves of the main point of the passage, then head to the answers, focusing on those that line up with the main point and then using our notes/the passage to find the correct answer

    Answer Anticipation/Relevant Lines:
    This question stem provides no indication as to the topic of the correct answer or where it'll show up in the passage. As such, we'll need to rely on our big-picture understanding of the passage to answer this question. We should start by reminding ourselves of the main point (either by reviewing what we said after reading the passage or by rereading our answer to the main point question). From there, we can head to the answers, deferring on those that don't line up with the main point. For those that do, we'll use our notes and the passage to see if it's correct.

    Answer Choice Explanation:
    (P1, S2; P2, S1) The author argues that heirloom crop varieties can potentially solve the issue of the eroding genetic base of North American crops, so this answer lines up with the main point. The author also contrasts the "hundreds of varieties" of heirloom crops with the "few, genetically identical varieties of crops" most agricultural practices in the US favor. From this, we can infer that maintaining many crop varieties, as indigenous farmers have done, can provide an advantage over cultivating just a single type with the highest yield. Namely, that variety of crops will maintain a broader genetic base and be more resistant to pests and diseases. This answer is therefore correct.

    Key Takeaway:
    Three of the answers here had the same problem: they were stronger than the statements in the passage! Noting while reading that the author used language such as "possible" to describe the proposed solution would allow us to eliminate answers that use language such as "the only," "always," and "must."

  5. E
    Crop geneticists must rely Remaining source text redacted.
    Why choice E is not credited
    (P1, S2) This answer is stronger than the author's main point, in that she argues that one approach is a "possible solution" to a problem. So any answer that talks about what "must" be done is too strong to be correct.

What this tests

Question analytics

Based on historical answer selection rates for this question.

Answer choice distribution

  1. A 10%
  2. B 11%
  3. C 2%
  4. D Credited 69%
  5. E 9%

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Discussion

  • Question # 5 1 reply

    Started by JosephRocco