Breeding of strawberries variety "Old Black", which is of uncertain origin. This variety was created by pollination, not direct manipulation of the plant's genes. Molecular breeding is the application of molecular biology tools in a breeding program. Genetic engineering is typically defined as the introduction of non-native genes into an organism. An excellent example of transgenic modification is in the case of cold resistant strawberries. In one particular variety genes from the arctic flounder, a fish that lives in very cold water, were used to give plants resistance to cold. This modification works because of the genetics of the arctic flounder. It lives
Capital and income breeding compared to income breeders by having to get their offspring to maturity before the feeding season ends. The length of the feeding season also selects for size in these organisms; income breeders are as small as possible so they can take advantage of having multiple generations per breeding season, in contrast with capital breeders, which are as large as possible so as to catch the most food to put into their reserves. Capital and income breeding Capital breeding and income breeding refer to the methods by which some organisms time breeding and use resources to finance breeding. In the models,