Extremes of Apple Development
The Burbank apple at the left is one of the largest apples ever grown; whereas the wild apples at the right are fruits of insignificant size. Note that the small apples are nearly all seeds, whereas the large apple is nearly all pulp. No more striking example could be given of the possibility of modifying a fruit through selective breeding. The wild apple may still be of service as a hybridizing agent in the development of hardy strains of cultivated apples.
This image is from: Luther Burbank: his methods and discoveries and their practical application. Volume 4 Chapter 6