Mutations are heritable, sudden changes in the structure of the gene, which has no relation to the individual's ancestry. These may be manifested by the changes in a plant's foliage, flowers, fruits, and even stems. Several factors such as environmental stress may trigger and influence the rate of mutation or the number of mutation that an organism will undergo; however, this will still not guarantee the direction where mutations would occur. Mutations do not happen to provide plants the traits that they need, as some of these changes may also be harmful. In fact, results of experiment reveal that mutations are random in nature. Hence, even though an organism is regularly exposed in an undesirable environment, this does not mean that mutations would instantly occur.