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Soru

Zorluk: ZorPrimary Purpose of the Whole Text

For decades, archaeologists assumed that the spread of dairy farming in prehistoric Europe was driven by the rapid natural selection of lactase persistence—the genetic mutation allowing adults to digest milk. However, a recent analysis of lipid residues on ancient pottery shards from the Iberian Peninsula reveals that early agriculturalists were processing dairy products long before the genetic mutation became widespread in the region. By demonstrating that dairy consumption preceded the genetic adaptation, the study suggests that cultural practices of milk processing, such as fermenting milk into cheese or yogurt to lower lactose content, may have acted as a buffer. Consequently, these cultural innovations created the evolutionary pressure that eventually favored the lactase persistence gene, rather than the gene facilitating the practice.

Which choice best states the main purpose of the text?

  1. A
    To demonstrate that lipid residue analysis is the most reliable method for tracing prehistoric dietary changes.
  2. To present research suggesting that cultural practices preceded and influenced a genetic adaptation in prehistoric populations.Cevap
  3. C
    To argue that the genetic mutation for lactase persistence was the primary driver behind the adoption of dairy farming in Europe.
  4. D
    To claim that genetic mutations in prehistoric human populations were entirely determined by shifts in agricultural technology.

Cevap

The primary purpose of the text is to present research suggesting that cultural practices preceded and influenced a genetic adaptation in prehistoric populations.
The correct answer is the option that describes presenting research suggesting that cultural practices preceded and influenced genetic adaptation. The passage details how early agriculturalists processed dairy before the lactase persistence mutation became common, concluding that cultural behaviors (like cheese-making) created the evolutionary pressure favoring the gene.

Adım Adım Çözüm

1
Identify the main argument of the text.
The text begins by introducing a long-held assumption that a genetic mutation (lactase persistence) drove dairy farming, but then introduces new evidence showing that dairy processing occurred before this mutation became widespread.
Understanding the transition from the old assumption to the new evidence helps locate the author's primary objective.
2
Analyze the relationship between culture and genetics as presented in the text.
The text explains that cultural innovations (fermenting milk) acted as a buffer and created the evolutionary pressure that favored the gene, meaning cultural practice drove genetic adaptation.
This establishes the core thesis that culture influenced genetic evolution.
3
Evaluate the choices to find the one that best captures this shift and the overall message.
The option describing cultural practices preceding and influencing genetic adaptation accurately summarizes the entire text, while other options focus on minor details, represent the challenged view, or are overly broad.
Evaluating the scope of each option ensures the selected answer covers the text as a whole rather than a single part.

Anahtar Kavram

Identifying the primary purpose of a passage by determining how its different parts (context, new evidence, and conclusion) work together to support a central thesis.
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Konular

Primary Purpose of the Whole Text

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