Biology, 26.07.2019 21:30, youngsunc02

Agroup of 50 sparrows (small birds) were blown off course by a storm during their winter migration. the birds were stranded on an island in the middle of the pacific ocean. because this island was too far from the mainland for a yearly migration, the sparrows only mated with the other sparrows stranded on the island. after 500 years, this small isolated group of sparrows had beaks 25% longer than the mainland population. this is an example of:

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Agroup of 50 sparrows (small birds) were blown off course by a storm during their winter migration....