<P> Gene banks are a type of biorepository which preserve genetic material . For plants, this could be by freezing cuttings from the plant, or stocking the seeds (e.g. in a seedbank). For animals, this is the freezing of sperm and eggs in zoological freezers until further need . With corals, fragments are taken which are stored in water tanks under controlled conditions . Plant genetic material in a' gene bank' is preserved at - 196 ° Celsius in Liquid Nitrogen as mature seed (dry). </P> <P> In plants, it is possible to unfreeze the material and propagate it, however, in animals, a living female is required for artificial insemination . While it is often difficult to use frozen animal sperm and eggs, there are many examples of it being done successfully . </P>

Plant genetic material in gene-bank is preserved at 196 c in liquid nitrogen as