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New York State LabRelationships andBiodiversityPre-lab Review
Evolution• Gradual change over time• If two organisms sharesimilarities, they are likelyrelated – share a commonancestor• ...
Evidence of Evolutionary Relationships• Structural evidence:– Comparative anatomy• Homologous structures• Vestigial struct...
Evidence of Evolutionary Relationships• Molecular evidence:– Comparative Biochemistry• Similar pigments (in plants)• Simil...
Structural Evidence in Plants• External structure• Seeds• Internal structure:– Conducting tissue – carries materials– Xyle...
Molecular Evidence in Plants• Pigments – absorb light• Chromatography – lab technique to separatepigments in plants
Molecular Evidence in Plants• Enzymes – speed up chemical reactions• Enzymes are specific
Molecular Evidence in Plants –Enzymes
Molecular Evidence in Plants• Gel electrophoresis – labtechnique to separatefragments of DNA fromorganisms
Molecular Evidence in Plants –Gel Electrophoresis
Molecular Evidence in Plants• Similarities in DNA code for amino acidsequence in particular proteins
Molecular Evidence in PlantsProtein Synthesis
Molecular Evidence in Plants
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Relationships and biodiversity pre lab review

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Relationships and biodiversity pre lab review

  1. 1. New York State LabRelationships andBiodiversityPre-lab Review
  2. 2. Evolution• Gradual change over time• If two organisms sharesimilarities, they are likelyrelated – share a commonancestor• The more similarities, themore closely related
  3. 3. Evidence of Evolutionary Relationships• Structural evidence:– Comparative anatomy• Homologous structures• Vestigial structures– Comparative embryology
  4. 4. Evidence of Evolutionary Relationships• Molecular evidence:– Comparative Biochemistry• Similar pigments (in plants)• Similar enzyme-controlled chemical reactions• Similarities in DNA structure• Similar proteins
  5. 5. Structural Evidence in Plants• External structure• Seeds• Internal structure:– Conducting tissue – carries materials– Xylem – carries water and nutrients– Phloem – carries food
  6. 6. Molecular Evidence in Plants• Pigments – absorb light• Chromatography – lab technique to separatepigments in plants
  7. 7. Molecular Evidence in Plants• Enzymes – speed up chemical reactions• Enzymes are specific
  8. 8. Molecular Evidence in Plants –Enzymes
  9. 9. Molecular Evidence in Plants• Gel electrophoresis – labtechnique to separatefragments of DNA fromorganisms
  10. 10. Molecular Evidence in Plants –Gel Electrophoresis
  11. 11. Molecular Evidence in Plants• Similarities in DNA code for amino acidsequence in particular proteins
  12. 12. Molecular Evidence in PlantsProtein Synthesis
  13. 13. Molecular Evidence in Plants

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