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Fossils and Evolution

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  1. Fossils and Evolution

  2. Amazing Events in Life History • Sex - Who Needs It? • We are a team - Mitochondria • The Great Freeze 900-600 m.y. ago • What survived and how? • Mass Extinctions • Dinosaurs = 4th worst • Permian extinction (220 m.y. ago) took out 90% of all species

  3. Mass Extinctions

  4. Classification of Dogs and Humans • Kingdom Animalia • Phylum Chordata • Class Mammalia • Order Carnivora (Dogs) Primates (Humans) • Family Canidae Hominidae • Genus Canis Homo • Species familiaris sapiens

  5. Strigiphilus garylarsoni “Actually, I considered this an extreme honor. Besides, I knew no one was going to write and ask to name a new species of swan after me. You have to grab these opportunities when they come along.”

  6. The Five Kingdom System • Animals • Plants • Protista (one-celled organisms) • Fungi • Bacteria* • Ediacaran Fossils? (ca. 700 m.y. ago)

  7. What’s Bigger Than a Kingdom? • Bacteria differ from all other kingdoms in lacking a cell nucleus • We need a bigger box • Superkingdoms or Domains • Monera (Bacteria) • Archaea • Eukarya (have cell nucleus) • Need electron microscopes and molecular biology to see differences