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Microevolutionary Processes
Case Study Designs
Macroevolution
Speciation
Mass Extinction
100
Sharp reductions in population size; Due to environmental factors
What is bottlenecks?
100
Address the adaptive value of the trait
What is ultimate explanations?
100
Speciation - Extinction =
What is biodiversity?
100
Geographic Barrier
What is allopatric speciation?
100
450 - 440 MYA
What is end- Ordovician ?
200
New populations started with small number of individuals
What is Founder Effect?
200
Address mechanisms that produce the trait
What is proximate explanations?
200
The evolution of new species
What is speciation?
200
Adjacent Habitat
What is parapatric speciation?
200
375 - 360 MYA
What is end- Devonian ?
300
Non-Random Fitness variation
What is Natural Selection?
300
The variable that changes
What is independent variable
300
Complete loss of a species
What is extinction?
300
Trait Polymorphism
What is sympatric speciation?
300
251 MYA
What is end - Permian?
400
Ultimate source of genetic variation
What is mutation?
400
The variable that measures the response
What is dependent variable?
400
Large die off of species, much greater than background levels
What is mass extinction?
400
Driven by ecology
What is ecological speciation?
400
205 MYA
What is end - Triassic ?
500
Exchange of alleles between populations
What is gene flow?
500
Can establish possible explanations; Cannot establish cause-and-effect
What is observational studies?
500
Idea of resurrecting extinct species
What is de-extinction?
500
Evolution of ecological diversity within a rapidly multiplying lineage
What is adaptive radiation?
500
65.5 MYA
What is end- Cretaceous?