Global Seed Conservation: PTE Listening: Fill in the Blanks practice questions

Deep inside an Arctic mountain, a secure repository protects agricultural from unforeseen global disasters. The facility relies on natural permafrost to maintain freezing conditions, which dramatically slows down biological within the plant embryos. Even if mechanical power systems should fail entirely, the subzero rock keeps the collection for decades. Technicians carefully dry each incoming sample before sealing it inside airtight foil to prevent moisture damage. This safe backup guarantees that vital crop varieties remain available for future programmes worldwide.

Preserving collections within botanical banks is not simply a matter of leaving jars untouched on dark for centuries. Over extended periods, the germination rate of older material will naturally as cellular damage accumulates. To prevent permanent loss, curators periodically withdraw a small fraction of seeds to conduct viability under controlled glasshouse conditions. If the proportion of sprouting seedlings falls below an acceptable , staff must grow those plants to maturity in order to harvest a fresh of replacement seeds.