Human Evolution: Science as a way of knowing - PowerPoint PPT Presentation

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Human Evolution: Science as a way of knowing

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  1. Human Evolution:Science as a way of knowing

  2. DIVERSITY OF LIFE OVER TIME

  3. DIVERSITY OF LIFE OVER TIME

  4. DIVERSITY OF LIFE:Cenozoic Era • Mammalian radiation

  5. WHAT IS A MAMMAL? Hair Mammary Glands Dentition

  6. PRIMATEEVOLUTION

  7. PRIMATEEVOLUTION

  8. Human Evolution: Bipedalism Pelvic Girdle & Foot Bones Foramen magnum Gluteus maximus

  9. HOMINID EVOLUTION: HUMAN ANCESTORS

  10. Human Evolution: Dentition Incisors Canines Molars

  11. Human Evolution: Dentition & Diet

  12. Human Evolution: Brain Elaboration

  13. PRIMATEEVOLUTION

  14. HUMAN PHYLOGENY • Phylogeny:maps of the evolutionary relationships between species/lineages. Phylogenies help us to understand species extinctions, ancestral and modern species origins, and the points at which lineages split, also known as speciation. • Phylogenetics:field of biology that examines the relationships between organisms, and the causes of the evolutionary patterns that are present. • Lineage:a general term that refers to a continuous line of descent, or a series of organisms that is connected by reproduction from parent to offspring.

  15. HOMINID EVOLUTION: HUMAN ANCESTORS

  16. HOMINID EVOLUTION: HUMAN ANCESTORS

  17. HOMINID EVOLUTION: HUMAN ANCESTORS

  18. Human Evolution and Mitochondrial DNA Energy-producing organelles Endosymbiosis? • Thousands of mitochondria in each cell, and each • one has its own small circle of DNA, separate from nuclear DNA • Why special/useful in relation to evolutionary relationships? • Unique inheritance pattern • Changes more rapidly than nuclear DNA, and high mutation • rate means there is plenty of genetic variation among people.

  19. Human Evolution:Science as a way of knowing POSSIBLE ACTUAL

  20. Speciation and Extinction