Biology
Biology, 03.07.2019 01:30, csorensen

Some individuals of a particular species of sea bird underwent a genetic mutation that resulted in larger beaks. the larger size of beaks these birds to break open clams and other mollusks for food. it also them defend themselves against predators. after many generations, almost all of the birds in the population had big beaks. for which two reasons did this phenomenon occur? natural selection mechanical isolation prezygotic barriers to reproduction high genetic variation in the species

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