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EVOLUTION

EVOLUTION. Or How did you arrive to this planet ?. THE ORIGIN OF LIFE. Atmosphere : inorganic molecules : CH4; NH3, H2O vapour , CO2, etc + Energy of the sun and the storms = Organic molecules Condensation produced liquid water = oceans

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EVOLUTION

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  1. EVOLUTION Or Howdidyouarrivetothisplanet?

  2. THE ORIGIN OF LIFE Atmosphere: inorganicmolecules: CH4; NH3, H2O vapour, CO2, etc + Energy of thesun and thestorms = Organicmolecules Condensationproducedliquidwater = oceans Oceans + biomolecules = complexbiomolecules Thefirstautoreplicativemoleculewas RNA!

  3. CURRENTS OF THINKING Creationsim: thiscurrent bases its ideas in theHolyBible; itsaysthattheCreatormadetheorganisms at once and therehaven’tbeenchanges in them. Evolutionism: itadmitschanges in organisms in time. Darwinism: Variation + adaptation = natural selection

  4. REASONS FOR EVOLUTION

  5. Mechanism of evolution: SPECIATION

  6. Darwin’sFilches (pinzones)

  7. TIMELINE

  8. EVOLUTION THEORIES

  9. Lamarckism

  10. Lamarck versus Darwin

  11. EVIDENCES OF EVOLUTION Geographicalevidences Zoological Embryological Geological Biological

  12. Adaptation: Homologousorgans

  13. Embryology

  14. New Theories Darwinism + genetics (mutations and recombination) + biochemistry + populationgenetics + new discoveries = NeodarwinismortheModernSynthesis Morgan, Haldane, Dobzhansky

  15. Origin of life Symbioticorigin of eukaryoticcells (EndosymbioticTheory): (Lynn Margulis and DorianSagan) Theendosymbiotictheorystatesthatseveralkeyorganelles of eukaryotesoriginated as symbiosesbetweenseparate single-celledorganisms. Accordingtothistheory, mitochondria and plastids (e.g.chloroplasts), and possiblyotherorganelles, representformerly free-living bacteriathatweretakeninsideanothercell as anendosymbiont. Molecular and biochemicalevidencesuggestthatthemitochondriondevelopedfromproteobacteriaand thechloroplastfromcyanobacteria-

  16. Endosymbiotictheory

  17. ComparisonCyanobacterium- Chloroplast

  18. Comparingtheories

  19. HUMAN EVOLUTION

  20. THE EARTH’S TIMELINE

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