It holds that natural mutations within a population of organisms will create some new forms that are better adapted to their environment. (sciencenewsforstudents.org)
As black raspberries and red raspberries went through natural mutations over time, yellow raspberries emerged. (detoxdiy.com)
Some experts feel the Grand Blue was crossed with other breeds to produce the modern breed while others feel the breed as we know it today is a result of natural mutation of the Grand Bleu aided by selective breeding. (puppy-training-solutions.com)