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Re: Study: Platypus Retains Bird Sex Link

Dora Smith wrote:

I understand that mammals are descended from a very primitive reptile near
the foot of the reptile family tree.    Dinosaurs are very highly evolved
reptiles near the top fo the reptile family tree.   Birds belong to one of
the major branches of dinosaurs, and they are highly evolved relative to
their feathered cousins.


(As a cautionary note... it's often better to avoid loaded terms like "very primitive" and "highly evolved" when discussing evolution.)

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