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
Rearing (horse) may also be linked to poorly fitted or improperly used tack. A rider or saddle-fitting specialist can determine if pain is linked to a poorly fitted saddle, or a broken saddle tree. The fit and severity of the bit can also lead to rearing. Riders should also consider the management of the horse, especially if the animal does not have turn-out time and has too rich of a diet. A horse may rear due to excitement and excess energy. For horses that rear while a person is leading them on the ground, the safest position for the handler is to