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Early Earth Workshop Professor Michael Williams

Early Earth Workshop Professor Michael Williams. EVOLUTION on the pre-Phanerozoic Earth. Professor Lynn Margulis Department of Geosciences University of Massachusetts-Amherst. REVOLUTION in EVOLUTION. pre-Phanerozoic?. EVERYTHING HAPPENED!. GAIA, the living Earth from space.

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Early Earth Workshop Professor Michael Williams

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  1. Early Earth Workshop Professor Michael Williams EVOLUTION on the pre-Phanerozoic Earth Professor Lynn Margulis Department of Geosciences University of Massachusetts-Amherst

  2. REVOLUTION in EVOLUTION pre-Phanerozoic?

  3. EVERYTHING HAPPENED!

  4. GAIA, the living Earth from space

  5. JAMES LOVELOCK The hypothesis and its extensions mention “some illustrious predecessors” Emily Dickinson Wm Buckland Chas DARWIN V.I.Vernadsky

  6. Darwinian time & Vernadskyian space

  7. Darwinian time & Vernadskyian space Charles Darwin 1809-1888 Vladimir Ivanovich Vernadsky 1883-1945

  8. reactive gases (oxygen, methane, CO2) acidity (pH) biomineralization, cloud condensation nuclei and oceanic rain, gaian mountains, plate tectonics, WATER RETENTION

  9. EONS

  10. EONS Archean 3900-2500 Proterozoic 2500-541 Phanerozoic 541-0

  11. PLANET WATER

  12. What evolves? Populations of individuals?

  13. first appearance in the fossil record 1st nucleated cells o NOW EONS HADEAN ARCHEAN PROTEROZOIC PHANEROZOIC

  14. EVOLUTION components of the process 1. Population growth (“biotic potential”) 2. Inherited changes 3. Natural selection

  15. EVOLUTION components of the process 1. Population growth (“biotic potential”)

  16. 2. Inherited changes A process of innovation

  17. EVOLUTION 2. Inherited changes

  18. A process of elimination 3. Natural selection

  19. EVOLUTION 2. Inherited changes

  20. EVOLUTION 2. Inherited changes

  21. EVOLUTION inheritance of “acquired characteristics” ?

  22. INHERITED CHANGES Random DNA mutations Chromosomal changes (karyotypic fission, polyploidy) Larval transfer (D.I. Williamson) SYMBIOGENESIS

  23. EVOLUTION no, SYMBIOGENESIS

  24. EVOLUTION inheritance of “acquired genomes”

  25. Evolution of chimaeras

  26. Symbiogenesis/Symbionticism

  27. Symbiogenesis Famintzyn Kozo-Polyanski 1845-1905 1890-1957 Symbionticism Wallin Mereschkhovski 1869-1910 1883-1969 1883-1969

  28. SYMBIOSIS long term physical association between members of different species SYMBIOGENESIS new behaviors, organelles, tissues, organisms, species as consequence of symbioses

  29. SYMBIOSIS or SYMBIOGENESIS ?

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