In 1829, London physician Nathaniel Bagshaw Ward accidentally discovered that delicate ferns enclosed within sealed glass containers containing damp soil could thrive for years without additional water. Previous transatlantic botanical expeditions suffered immense losses, as live specimens housed on open ship decks succumbed to salt spray, extreme temperature fluctuations, and freshwater rationing. Ward refined his observation into the 'Wardian case'—a protective, sealed glass terrarium that revolutionized global agricultural transfer during the nineteenth century. By creating a microclimate where moisture evaporated from soil condensed on the glass interior and trickled back into the soil, the Wardian case shielded plants from ambient sea air while preserving atmospheric humidity. Notably, the case did not require artificial heating or manual ventilation, relying entirely on ambient sunlight to sustain photosynthesis and internal hydrological cycling. Consequently, in 1848, Scottish botanist Robert Fortune utilized Wardian cases to successfully transport over twenty thousand tea plants from China to British India, dismantling China's monopoly on tea production.
Based on the passage, which of the following statements about the Wardian case is explicitly supported? Select all that apply.
- It enabled plants to survive long sea voyages by maintaining an internal hydrological cycle powered by natural light.Answer
- BIt required periodic manual ventilation to prevent excess condensation from damaging specimens.
- Its sealed design shielded transported specimens from exposure to airborne sea salt.Answer