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Evolution by Natural Selection THE THEORY OF DARWIN. mya. 1.5. Plants. Birds. 63. Mammals. 135. Reptiles. Seed Plants. Flowering. Amphibians. Insects. Dinosaurs. 180. Teleost Fish. Land Plants. Jawless Fish. 225. Chordates. Molluscs. Arthropods. 280. Multicellular Animals. - PowerPoint PPT Presentation