Reading Comprehension

PT156 · S1 · P1 · Q1 Heirloom Crops

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Because most agricultural practices in North America produce row after row of only a few, genetically identical, varieties of crops, the continent's food system rests precariously on a rapidly eroding genetic base, increasingly susceptible to pests and disease.

Topic

North American agriculture’s growing reliance on a few genetically identical crops, and the importance of conserving heirloom crop varieties and indigenous agricultural knowledge.

Framework

Problem / Solution

Main Point

The main point is that North American agriculture is at risk due to its dependence on a narrow genetic base, and that saving heirloom crop varieties—and the indigenous knowledge that sustains them—is essential for more sustainable, pest- and disease-resistant farming. The Most Valuable Sentence: This idea is summed up at the end of the last paragraph:

P1: The Problem—Genetic Uniformity and Its Risks

North America mostly grows just a few, genetically identical crops, which makes the entire food system vulnerable to pests and diseases. The author introduces heirloom crops as a possible solution, noting they've only recently been recognized as valuable by mainstream scientists. Traditional methods focused on maximizing yield don’t maintain genetic diversity.

P2: Indigenous Methods and Genetic Diversity

Indigenous farmers have a long history of using practical genetics, such as hybridization, to create many different types of crops that are naturally more resistant to pests and tailored to their environment. These heirloom crops need less irrigation because they've been adapted for specific local conditions.

P3: Seeds, Knowledge, and Current Threats

Indigenous farmers have maintained both seeds and the knowledge to grow them through family and community networks. But, modern economic pressures and market economies have led to fewer small farmers, a move toward commercial seeds, and loss of these exchange networks. The author argues urgent action is needed to preserve both the genetic resources (heirloom crops) and the indigenous knowledge, to ensure future sustainability for agriculture.

Which one of the following most accurately states the main point of the passage?

Heirloom crops need to be
Wrong Emphasis: protect culture
When we use not only X but also Y, there is an implicit emphasis on the second part: "She has not only played chess for many years but also won many tournaments!" This passage is only concerned with the Problem of declining crop diversity, and we're only talking about heirlooms as a solution to that problem. So this answer is putting way too much emphasis on the idea that "Heirloom crops need to be protected in order to protect North American cultures". The author never identified evaporating culture as a problem. Finally, the recommendation from this passage is less about "protecting" heirloom crops themselves and more about making sure we acquire as much of the indigenous farmers' knowledge about heirloom crops.
5% picked this
Indigenous farmers originated the practice
Wrong Emphasis: missing Solution
The central topic of the passage was heirloom crops, and that idea doesn't show up in this answer choice at all. Even if we forgave it that omission, this main thrust of this answer is that "the practice of creating hybrid crops to maximize yields was overlooked until recently by crop geneticists". We're not reading about heirloom crops because of their ability to maximize yields. We're reading about them because of declining crop diversity (a problem that has actually come to fruition because crop geneticists were only worried about maximizing yields).
2% picked this
Correct
The problem of an eroding
Why this is right
This is sneaky-mean, since it doesn't mention heirloom crops, which is the main character of the passage. It just alludes to them as "specialized crops". But beyond that, this answer by far is the closest match for the final sentence of the passage. It also captures the Problem (eroding crop genetic base) and the Solution (steps must be taken to preserve indigenous knowledge systems and integrate them).
Skill tested: Main Point · how this choice captures the passage's function is the move to repeat next time.
90% picked this
Erosion of the crop genetic
Wrong Emphasis
Wrong Emphasis: missing Solution Unsupported Causal Relationship The easiest way to eliminate this is that it doesn't sound like "We should preserve indigenous knowledge of heirloom crops". It is a description of a Problem, but the main point should be a sentiment that expresses the Call to Action at the end of the passage, the Solution. But in addition, this answer says that the erosion of the crop genetic base is because of a loss of indigenous knowledge, but the passage locates the cause of the eroding genetic diversity as the result of crop geneticists who solely looked at non-North American methods for maximizing yields.
2% picked this
The wide variety of heirloom
Unsupported Causal Relationship
Again, the easiest way to eliminate this is that it doesn't sound like a Solution to a Problem. It's just a causal statement about the present, not a recommendation for the future. Beyond that, it says something more or less contradicted by the passage. We had two different things going on ... indigenous farmers were growing a wide variety of heirloom crops, and crop geneticists who have been ignoring those indigenous farmers while putting their efforts into procuring the best yields by using techniques not from North America. The passage was saying, "Because we've been putting efforts into procuring the best yields, we've been ignoring the wide variety of heirlooms maintained by indigenous farmers."
1% picked this

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