sentence: Vavilovian mimicry is caused by unintentional selection by humans.
sentences_before: This is mimicry in plants where a weed comes to look like a crop plant. Before herbicides, weeds were plucked by hand. This has been done for thousands of years. The weeds come to look like the crop because the weeders pick those weeds which look most different.
sentences_after: The weeds that survive pass on their genes. Gradually, all the weeds look more like the crop plant.
concept_name: vavilovian mimicry
headings: Nikolai Vavilov Vavilovian mimicry
categories: 1887 births 1943 deaths Evolutionary biologists Geneticists Russian botanists