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according to the theory of evolution, birds feathers evolved from: a) reptiles scales b) fish fins c) gill slits d) gill arches
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according to the theory of evolution, birds feathers evolved from: a) reptiles scales b) fish fins c) gill slits d) gill arches

User Elan Hamburger
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reptile scales! Or, more specifically, reptiles descended from dinosaurs. 
User Branden
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