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Soru

Zorluk: KolayInferences from the Text

Botanists studying fossilized Ginkgo biloba leaves have documented an inverse relationship between atmospheric carbon dioxide concentrations and stomatal density—the number of microscopic gas-exchange pores per unit of leaf surface area. When atmospheric carbon dioxide levels rise, Ginkgo trees produce leaves with fewer stomata, thereby reducing water loss through transpiration without compromising photosynthetic efficiency. Conversely, during periods marked by lower atmospheric carbon dioxide concentrations, the trees develop leaves with significantly higher stomatal densities to capture adequate carbon dioxide for survival.

Which of the following is most strongly supported by the passage?

  1. A
    Ginkgo biloba is the only plant species that adjusts its stomatal density in response to changes in atmospheric gas concentrations.
  2. B
    A reduction in stomatal density inevitably impairs the overall photosynthetic efficiency of Ginkgo biloba leaves.
  3. Fossilized Ginkgo leaves exhibiting comparatively low stomatal densities grew during geological periods when atmospheric carbon dioxide levels were relatively elevated.Cevap
  4. D
    Prehistoric fluctuations in atmospheric carbon dioxide concentrations were primarily caused by volcanic outgassing and oceanic cycles.
  5. E
    Ginkgo trees require substantially higher concentrations of atmospheric carbon dioxide to survive than do most other contemporary deciduous species.

Cevap

Fossilized Ginkgo leaves exhibiting comparatively low stomatal densities grew during geological periods when atmospheric carbon dioxide levels were relatively elevated.
The passage defines an inverse relationship between atmospheric carbon dioxide concentrations and stomatal density in Ginkgo biloba leaves, noting that higher carbon dioxide levels lead to fewer stomata. Thus, it is directly inferable that fossil leaves with low stomatal densities grew during periods of relatively high atmospheric carbon dioxide.

Adım Adım Çözüm

1
Identify the core relationship defined in the text.
The text explicitly establishes an inverse relationship between ambient atmospheric carbon dioxide levels and the stomatal density of Ginkgo leaves.
Tracking how the two variables correlate is essential for evaluating textual inferences.
2
Apply the rule to specimens exhibiting low stomatal density.
Because lower stomatal counts correspond to higher ambient carbon dioxide levels, specimens with fewer stomata must have developed in high carbon dioxide environments.
Synthesizing the inverse rule allows for direct deduction regarding specific fossil characteristics.
3
Evaluate the choices to find the statement that requires no unstated assumptions.
The statement correlating low stomatal density with relatively high carbon dioxide levels is strictly entailed by the text.
Valid LSAT reading comprehension inferences must be fully grounded in the passage without overextension.

Anahtar Kavram

Direct inference from an inverse proportional relationship stated in a scientific passage.
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Konular

Inferences from the Text

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