Part one of term paper
Genetic variation is the raw material for the plant breeder, who must often select from primitive and wild plants, including wild species, in search of new genes. The appearance of new diseases, new pests, or new virulent forms of disease causing organisms makes it imperative that the plant be preserved, because it offers a potential for th ...

Part two of term paper
... that is used to describe repositories for genes of living organisms. It is commonly used in the context of plant breeding as I described above, but it also applies to the freezing and the storage of animal sperm and embryos for use in animal husbandry or artificial insemination. An understanding of crop origins and variations is necessary in assembling genetic diversity in plant crops. In certain geographical areas there has existed a rich source of variability in crop plants but the encroachmen ...