Look What Apples Can Lead To. . .

ApplesThe introduction of apples to America over 400 years ago has led to interesting new insights into evolution.  Dr. Jeff Feder, a biologist at the University of Notre Dame, and his colleagues recently reported in Science that approximately 250 years ago some hawthorn flies, Rhagoletis pomonella, started to lay their eggs on apples rather than on the small, red fruit of the hawthorn tree.  These flies became genetically distinct from the larger hawthorn fly population.  In turn, the wasps that eat these flies’ larvae also became genetically distinct.  This discovery is important because of the insights it provides into how new species arise.  For more information, see Physorg.com here.

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