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The top documents tagged [oxygenoxygen amounts]
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Animal Circulation and Gas Exchange. Cardiovascular System Heart –atria & ventricles Arteries Arterioles Capillaries Venules Veins
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Evolution of the Tetrapods
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Evolution of the Tetrapods. Vertebrates The Origin of Tetrapods The first vertebrates on land were amphibians in the Devonian (400 mya) Arose from
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Evolution of the Tetrapods. The Origin of Tetrapods The first vertebrates on land were amphibians in the _________(400 mya) Arose from the rhipidistian
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