store seeds of vulnerable wild plants so the species would not go globally extinct if they became extinct in the wild
species are often selected because they are threatened in the wild or are important to humans e.g. medicines and Crop Wild Relatives
the viability of seeds is tested with x-ray photography
seeds are stored under dry or refrigerated conditions
the target number of seeds per species is 10,000 to ensure a diverse gene pool
seeds are stored underground in a reinforced volt to reduce risk of a major accident
