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Difficulty: MediumRhetorical Functions of Sentences and Paragraphs

For decades, biologists assumed that complex decision-making required a centralized nervous system. However, recent experiments with the single-celled slime mold *Physarum polycephalum* have challenged this dogma. When placed in a maze with oatmeal at two different exits, the organism reorganizes its tubular body to connect the food sources via the shortest possible path, effectively solving the maze. It does this by leaving a trail of chemical slime where it has already explored, avoiding those paths in the future. This externalized spatial memory functions as a primitive navigational system. Consequently, researchers are beginning to redefine intelligence, viewing it not as a privilege of brain-bearing animals, but as a fundamental characteristic of self-organizing living systems.

Which of the following best describes the primary rhetorical function of the statement 'This externalized spatial memory functions as a primitive navigational system'?

  1. A
    It provides a counterargument to the claim that single-celled organisms can solve complex mazes.
  2. B
    It details the specific chemical components that make up the slime mold's physical trail.
  3. It conceptualizes the biological behavior described in the previous sentence by framing it in terms of memory and navigation.Answer
  4. D
    It transitions the passage from a focus on slime molds to an exploration of human memory storage.

Answer

It conceptualizes the biological behavior described in the previous sentence by framing it in terms of memory and navigation.
The correct answer correctly identifies that the target sentence serves to conceptualize the behavior described immediately before it. The author takes the physical act of leaving a chemical trail to avoid past paths and explains its function by labeling it as an 'externalized spatial memory' and a 'navigational system.'

Step-by-Step Solution

1
Analyze the target sentence in its surrounding context.
The target sentence refers back to the behavior described in the previous sentence (leaving a slime trail to avoid explored paths) using the phrase 'This externalized spatial memory'.
Understanding what the sentence refers to is crucial to determining its relationship with the surrounding text.
2
Determine the role or purpose of the target sentence.
The sentence translates the physical action of leaving a trail into a broader cognitive concept ('spatial memory' and 'navigational system') to explain how a brainless organism achieves navigation.
This identifies the rhetorical function of the sentence rather than just its literal meaning.
3
Evaluate the choices to find the one that matches this function.
The correct option matches this by stating that the sentence conceptualizes the biological behavior in terms of memory and navigation. The other options mischaracterize the sentence's relationship to the surrounding text.
Comparing our analysis to the options allows us to eliminate distractors and select the correct answer.

Key Concept

Identifying the rhetorical function of a specific sentence within a paragraph involves explaining how that sentence contributes to the author's argument or explanation rather than merely restating its literal details.
Estimated Time:1m 30s
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Topics

Rhetorical Functions of Sentences and Paragraphs

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