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Unformatted text preview: 1 Swinging in the Tree of Life Tree of Life by Gustav Klimt (1909) www.artinthepicture.com 2 Unity & Diversity of Life Organisms exploit many physiochemical processes Spontaneous reactions produce order at the expense of universal disorder Moderately stable information storage allows adaptation Use diffusion along gradients evolve transport systems where diffusion ineffective History matters! innovations produced by early life forms retained & enhanced in more advanced organisms 3 Unity & Diversity of Life Darwin organisms related to each other in complex tree of life www.wikipedia.com 4 Phylogenies Representations of relationships between organisms Understand underlying unity of life Provide insights into evolutionary innovations Based on types of similarities between species Primitive similarity Convergent similarity Derived similarity 5 Similarity Primitive similarity Single origin in distant ancestor does no imply close relationship Homologous structures e.g., amniotic egg in birds (Fig. 33.17) & mammals (Fig....
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- Spring '08