Alien species - A species that has moved into a new ecosystem where it was previously unknown, Endangered species - A species is one that is threatened with extinction, National park - Large area of land set aside for conservation where agriculture, construction, mining and other activities are strictly controlled., Captive breeding programme - Breeding animals in zoos with the long term aim of reintroducing them to their natural habitat, Artificial insemination - Process involving the injection of semen collected from a male into the uterus, Embryo transfer - The removal of embryos from the uterus of a female mammal of an endangered species shortly after fertilisation and their transfer to a surrogate, Frozen zoo - A facility where genetic materials taken from animals are stored at very low temperatures, Botanic garden - Area where seeds and cuttings are taken from endangered plant species and grown, Seed bank - Seeds are collected from endangered species and placed into cold storage, Tissue culture - Process in which endangered plants can be grown from a few cells on a nutrient medium,

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