1/30/18 evidence for evolution...page 61 evidence for evolution 1. comparative anatomy •...
TRANSCRIPT
EVIDENCE FOR EVOLUTION1/30/18
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DO NOW▸ What is the difference between divergent and
convergent evolution?
▸ What kind of information do cladograms show?
AGENDA
▸ Evidence for evolution notes
▸ Summary
▸ Practice
EVIDENCE FOR EVOLUTIONCORNELL NOTES TITLE (PAGE 61)
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EVIDENCE FOR EVOLUTION1. Comparative Anatomy
• Homologous and analogous structures
• Vestigial structure
2. Comparative Embryology
3. Comparative biochemistry
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COMPARATIVE ANATOMY‣ Study of similarities and differences of the
anatomies of different organisms
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ANATOMICAL STRUCTURES▸ Structures of organisms and their parts
▸ Parts of body, organs, etc.
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FOSSIL RECORD‣ History of life
documented by fossils
‣ Fossil record represents less than 1% of all species that ever lived
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HOMOLOGOUS STRUCTURES‣ Structures inherited from the same ancestor;
variation in use
QUICK CHECK• Do homologous structures arise from
convergent or divergent evolution?
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ANALOGOUS STRUCTURE‣ Different anatomies (from different ancestors)
but similar functions
QUICK CHECK• Do analogous structures arise from convergent
or divergent evolution?
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VESTIGIAL STRUCTURE‣ Anatomical structure that was important to an
ancestor, but no longer serves a purpose
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COMPARATIVE EMBRYOLOGY
‣ Comparing embryos of species
‣ Embryo = unborn offspring in the process of development
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COMPARATIVE BIOCHEMISTRY▸ Comparing DNA, genes, and/or proteins of
species
EVIDENCE FOR EVOLUTION
1. Anatomical structures (fossil records)
• Comparative Anatomy
• Homologous and analogous structures
• Vestigial structure
2. Comparative Embryology
3. Comparative biochemistry
PRACTICEEVIDENCE FOR EVOLUTION (INDIVIDUAL)
ILLUSTRATIVE SUMMARYPAGE 60 (UNDER DO NOW)
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ILLUSTRATIVE SUMMARY
‣ ALL TERMS must be included
‣ If you do a flow chart, you must explain the connections
‣ Use at least 4 colors
‣ Label as necessary