Soru

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?