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Difficulty: MediumEvaluating Inter-Passage Relationships and Function

Passage A
For decades, marine bioacousticians modeled baleen whale vocalizations primarily through a rigid evolutionary lens, framing humpback and blue whale songs as instinctual acoustic signals designed for long-range navigation and mate selection. Early acoustic studies prioritized quantifiable physical properties—such as frequency modulation, amplitude, and propagation distance through oceanic sound channels—treating vocal variations as simple genetic divergence between isolated populations. Under this framework, vocal patterns were viewed as static within a lineage, altering only across evolutionary timescales as genetic mutations dictated physical differences in vocal anatomy.

Passage B
Recent longitudinal tracking of humpback whale populations across the South Pacific challenges the assumption that marine acoustic communication is strictly genetically hardwired. Researchers observed entire migratory pods rapidly adopting new, complex song structures introduced by roving individual whales from neighboring western basins within a single breeding season. This swift horizontal transmission of vocal novelty across geographic boundaries suggests that whale song represents a dynamic cultural phenomenon governed by social learning rather than slow genetic shift. Consequently, bioacoustics must expand beyond mechanistic physical models to incorporate social dynamics and regional dialects.

Which of the following best describes the functional relationship between Passage B and Passage A?

  1. Passage B presents empirical observations of rapid social learning to challenge the foundational assumption of genetic determinism described in Passage A.Answer
  2. B
    Passage B provides mathematical refinements to strengthen the quantitative propagation models established in Passage A.
  3. C
    Passage B completely refutes the assertion in Passage A that whale songs travel across long distances through oceanic sound channels.
  4. D
    Passage B summarizes historical studies on whale vocal anatomy to elaborate upon the evolutionary claims in Passage A.

Answer

Passage B presents empirical observations of rapid social learning to challenge the foundational assumption of genetic determinism described in Passage A.
The correct choice accurately identifies the relationship: Passage A describes a traditional framework attributing whale vocalizations strictly to genetic inheritance and physical mechanics, while Passage B introduces recent evidence of rapid song transmission across pods to demonstrate that vocal patterns are culturally learned, thereby challenging Passage A's underlying premise.

Step-by-Step Solution

1
Analyze the main argument and perspective of Passage A.
Passage A describes an older, established view that whale vocalizations are strictly instinctual, static, and driven by genetic divergence over long evolutionary timescales.
Understanding Passage A establishes the baseline thesis regarding whale song origins.
2
Analyze the main argument and perspective of Passage B.
Passage B introduces new longitudinal evidence showing rapid adoption of new song patterns within a single season, concluding that whale songs are culturally transmitted via social learning.
Understanding Passage B reveals how it responds to the classical view.
3
Synthesize the functional relationship between the two passages.
Passage B serves to counter and expand upon the genetic/instinctual assumption of Passage A by offering evidence for social learning and cultural transmission.
Evaluating how Passage B modifies or refutes the primary assumption of Passage A answers the inter-passage relationship question.

Key Concept

Evaluating Inter-Passage Relationships and Function
Estimated Time:1m 30s
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Evaluating Inter-Passage Relationships and Function

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