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PATTERNS FOR EVOLUTION 2/3/20
PATTERNS FOR EVOLUTION2/3/20
PAGE 14
DO NOW▸ Compare and contrast founder effect and gene
flow
▸ What is speciation?
▸ How does reproductive isolation lead to speciation?
AGENDA
▸ Patterns for evolution
▸ Summary
▸ Practice
PATTERNS FOR MACROEVOLUTION
CORNELL NOTES TITLE (PAGE 15)
PAGE 15
PATTERNS FOR MACROEVOLUTION▸ Divergent evolution
▸ Convergent evolution
▸ Coevolution
▸ Punctuated equilibrium
▸ Adaptive radiation
▸Mass Extinction
DIVERGENT EVOLUTION▸ Formation of new and different species from a
common ancestor
PAGE 15
CONVERGENT EVOLUTION▸ Evolution of similar features from DIFFERENT
ancestors
PAGE 15
COEVOLUTION▸ Two (or more) species affect each other’s
evolution
PAGE 15
PUNCTUATED EQUILIBRIUM▸ Rare and rapid speciation, followed by little to
no evolutionary change, and so forth…
PAGE 15
ADAPTIVE RADIATION▸ Common ancestor evolves into different
species, each adapted to a different environment
PAGE 15
MASS EXTINCTION▸ Extinction of a large number of species in a
short amount of time
▸ Due to catastrophic global event or rapid environmental change
PAGE 15
Check for understanding
1. Divergent evolution2. Convergent evolution3. Coevolution4. Punctuated equilibrium5. Adaptive radiation6. Mass extinction
Check for understanding
1. Divergent evolution2. Convergent evolution3. Coevolution4. Punctuated equilibrium5. Adaptive radiation6. Mass extinction
Check for understanding
1. Divergent evolution2. Convergent evolution3. Coevolution4. Punctuated equilibrium5. Adaptive radiation6. Mass extinction
Check for understanding
1. Divergent evolution2. Convergent evolution3. Coevolution4. Punctuated equilibrium5. Adaptive radiation6. Mass extinction
Check for understanding
1. Divergent evolution2. Convergent evolution3. Coevolution4. Punctuated equilibrium5. Adaptive radiation6. Mass extinction
Check for understanding
1. Divergent evolution2. Convergent evolution3. Coevolution4. Punctuated equilibrium5. Adaptive radiation6. Mass extinction
Check for understanding1. Divergent evolution2. Convergent evolution3. Coevolution4. Punctuated equilibrium5. Adaptive radiation6. Mass extinction
WORKSHEET
PRACTICE▸ Finish both worksheets and the summary!
ILLUSTRATIVE SUMMARYPAGE 14 (UNDER DO NOW)
PAGE 14
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
‣ Drawings must be different from what was shown in lecture
HOMEWORK
