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Marine bird - PowerPoint PPT Presentation

MARINE VERTEBRATES

MARINE VERTEBRATES. REPTILES AND BIRDS. Transition to Land. Acanthostega. Transition to Land. About 350 million years ago, vertebrates came onto land Descended from bony fishes Four problems these original land verts faced must withstand the effects of gravity must be able to breath air

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Marine bird - PowerPoint PPT Presentation

MARINE VERTEBRATES