Evolution not just a theory
Miller-Urey, 1953 <ul><li>amino acids, sugars, etc. were produced </li></ul><ul><li>other mixtures led to formation of nuc...
Protenoids <ul><li>heating organic components to high temps results in structures with a protein like properties (Fox) </l...
“ Self-Assembly” <ul><li>take the proteins and nucleic acid components of the tobacco mosaic virus together in the right c...
Endosymbiont Hypothesis <ul><li>Chloroplasts and Mitochondria: </li></ul><ul><li>have their own DNA and their own ribosome...
Endosymbiont Hypothesis <ul><li>Chloroplasts and Mitochondria: </li></ul><ul><li>have their own DNA and their own ribosome...
Endosymbiont Hypothesis <ul><li>Chloroplasts and Mitochondria: </li></ul><ul><li>have their own DNA and their own ribosome...
Endosymbiont Hypothesis <ul><li>Chloroplasts and Mitochondria: </li></ul><ul><li>have their own DNA and their own ribosome...
Endosymbiont Hypothesis (cont’d) <ul><li>Chloroplasts and Mitochondria have structural  similarities to: </li></ul>
Endosymbiont Hypothesis (cont’d) <ul><li>Chloroplasts and Mitochondria have structural  similarities to: </li></ul>cyanoba...
Endosymbiont Hypothesis (cont’d) <ul><li>Chloroplasts and Mitochondria have structural  similarities to: </li></ul>cyanoba...
Endosymbiont Hypothesis (cont’d) <ul><li>Chloroplasts and Mitochondria have structural  similarities to: </li></ul>cyanoba...
Sugar Rays: the evolution of photosynthesis <ul><li>http://www.pubinfo.vcu.edu/secretsofthesequence/search_frame.asp </li>...
end of part 1
part 2
Darwin’s theory of evolution by natural selection
Overproduction populations tend to produce more offspring than are needed Variation individuals within a population vary i...
Individuals do NOT evolve!!! . . . but  populations  do.
 
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Evolution

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Transcript of "Evolution"

  1. 1. Evolution not just a theory
  2. 2. Miller-Urey, 1953 <ul><li>amino acids, sugars, etc. were produced </li></ul><ul><li>other mixtures led to formation of nucleotide bases </li></ul>
  3. 3. Protenoids <ul><li>heating organic components to high temps results in structures with a protein like properties (Fox) </li></ul><ul><li>some engaged in enzyme like behavior (splitting and bonding) </li></ul><ul><li>some in hormone-like behavior (melanin production) </li></ul><ul><li>when allowed to cool, some developed a double membrane and selective permeability </li></ul><ul><li>different in many ways from actual proteins, however </li></ul>
  4. 4. “ Self-Assembly” <ul><li>take the proteins and nucleic acid components of the tobacco mosaic virus together in the right conditions and they spontaneously aggregate into the structure needed to produce the virus </li></ul><ul><li>components of ribosomes will self-aggregate (Nomura) </li></ul><ul><li>components of RNA will self-aggregate </li></ul><ul><li>synthetic RNA will self-replicate (Joyce) </li></ul>
  5. 5. Endosymbiont Hypothesis <ul><li>Chloroplasts and Mitochondria: </li></ul><ul><li>have their own DNA and their own ribosomes </li></ul>
  6. 6. Endosymbiont Hypothesis <ul><li>Chloroplasts and Mitochondria: </li></ul><ul><li>have their own DNA and their own ribosomes </li></ul>ribosome structure is different than the ribosomes of eukaryotes
  7. 7. Endosymbiont Hypothesis <ul><li>Chloroplasts and Mitochondria: </li></ul><ul><li>have their own DNA and their own ribosomes </li></ul><ul><li>reproduce independently of the cell </li></ul>ribosome structure is different than the ribosomes of eukaryotes
  8. 8. Endosymbiont Hypothesis <ul><li>Chloroplasts and Mitochondria: </li></ul><ul><li>have their own DNA and their own ribosomes </li></ul><ul><li>reproduce independently of the cell </li></ul><ul><li>cells have no other way to make them </li></ul>ribosome structure is different than the ribosomes of eukaryotes
  9. 9. Endosymbiont Hypothesis (cont’d) <ul><li>Chloroplasts and Mitochondria have structural similarities to: </li></ul>
  10. 10. Endosymbiont Hypothesis (cont’d) <ul><li>Chloroplasts and Mitochondria have structural similarities to: </li></ul>cyanobacteria
  11. 11. Endosymbiont Hypothesis (cont’d) <ul><li>Chloroplasts and Mitochondria have structural similarities to: </li></ul>cyanobacteria bacteria
  12. 12. Endosymbiont Hypothesis (cont’d) <ul><li>Chloroplasts and Mitochondria have structural similarities to: </li></ul>cyanobacteria (autotrophs) bacteria (heterotrophs) Hypothesis : chloroplasts and mitochondria are descendents of some kind of ancient bacteria
  13. 13. Sugar Rays: the evolution of photosynthesis <ul><li>http://www.pubinfo.vcu.edu/secretsofthesequence/search_frame.asp </li></ul>click the black box to begin movie
  14. 14. end of part 1
  15. 15. part 2
  16. 16. Darwin’s theory of evolution by natural selection
  17. 17. Overproduction populations tend to produce more offspring than are needed Variation individuals within a population vary in their phenotype and therefore their genotype Natural Selection some variants will be favored in a particular environment while others might be disfavored Evolution each new generation will contain proportionally more descendents from individuals with favorable characteristics
  18. 18. Individuals do NOT evolve!!! . . . but populations do.

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