1/30/18 evidence for evolution...page 61 evidence for evolution 1. comparative anatomy •...

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