Selective breeding
Selective breeding is a form of artificial selection in which humans choose organisms with desired traits for reproduction. It is used to alter the characteristics of crops and domesticated animals over generations.
Wild peaches were only 25mm long with a flesh-to-pit ratio of just 3:2—essentially an almond with a thin layer of flesh. Peaches and almonds are very closely related species, and if you look closely at a peach pit, you can see it resembles an almond.
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Corn's ancestor is teosinte, a plant resembling foxtail grass with almost nothing edible. Humans spent centuries on selective breeding, picking the best mutations, to create modern corn. Today, a single corn kernel has more nutrition than an entire ear of ancient teosinte.
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