Soru

Biologists long assumed that abyssal benthic ecosystems were entirely sustained by the slow descent of photosynthetic detritus—often termed 'marine snow'—from epipelagic surface waters. The discovery of hydrothermal vent communities in 1977 overturned this paradigm by demonstrating that primary production could occur independently of solar radiation via chemoautotrophy. In these aphotic environments, sulfur-oxidizing bacteria serve as the ecological foundation, converting hydrogen sulfide and carbon dioxide into organic carbohydrates. To illustrate the extreme evolutionary specialization supporting this metabolic strategy, researchers frequently point to the giant tube worm Riftia pachyptila, which lacks an alimentary canal and instead houses vast colonies of sulfur-oxidizing endosymbionts within an internal vascular organ known as the trophosome. Rather than ingesting particulate matter, the organism relies on specialized hemoglobin molecules to bind and transport dissolved inorganic nutrients directly to these internal symbionts.

Which of the following most accurately describes the primary function of the author's reference to the trophosome of Riftia pachyptila in the passage?