List any four techniques where principle of ex-situ conservation of biodiversity has been employed.
Ex situ conservation is conserving the animals and plant outside the natural habitat. Ex situ conservation includes offsite collection and gene banks.
Offsite collections are the live collection of file and domesticated species in the botanical garden.
Gene bank is an institution where available plant material is preserved in a viable condition.
Seed Bank stores seed in viable state
Zoos or zoological arks are places where animals are kept in captivity and bred.