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bird feathers are modified scales. true false
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a bird's feathers would seem to be
true or false bird questions
feathers are thought to be modified
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bird feathers are modified scales. true false, bird feathers are modified scales, all birds have feathers true or false, are feathers modified scales, a bird's feathers would seem to be, true or false bird questions, feathers are thought to be modified, true or false only birds have wings
