diversity through extrapolation of microevolutionary mechanisms
DESCRIPTION
Macroevolution. Diversity through extrapolation of microevolutionary mechanisms. Groupings. Population Local group of orgs of one species. Groupings. Species Populations of organisms that may interbreed to produce fertile offspring. Geographic Isolation. - PowerPoint PPT PresentationTRANSCRIPT
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Diversity through extrapolation of
microevolutionary mechanisms
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GroupingsPopulation
Local group of orgs of one species
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GroupingsSpecies
Populations of orgs that may interbreed to produce fertile offspring
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Isolation of Subpopulations
Mechanisms of evolution cause isolated subpopulations to diverge
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Geographic IsolationPopulations are physically separated
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GeographicIsolationNatural selection, mutations, and gene flow occur independently in isolated populations
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J F M A M J J A S O N D
Reproductive Isolation
Mating Season
for Group A
Mating Season
for Group B
Pops overlap, but are unable interbreed successfullyPrezygotic
Behavioral Temporal Mechanical
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PostzygoticInviabilityInfertility
Reproductive Isolation
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Evidence of Evolution
Fossil RecordExtant species are not the only ones to have existed on Earth
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Fossil RecordSome fossils indicate missing links between extant groups
Evidence of Evolution
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Rates of Change
Punctuated Equilibrium
Gradualism
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Evidence of Evolution
Homologous
Structures
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Evidence of Evolution
Analogous Structures
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Evidence of EvolutionVestigial Structures
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Biochemistry Molecular comparisons
indicate relations (closer match = closer relation) DNA Hybridization Protein Comparison (amino
acid sequence)
A
B
C
A BA+B
Evidence of Evolution
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Similarity in embryology indicates common ancestry
Evidence of Evolution
Sponge
Jellyfish
Clam
Insect
Human
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Evidence of Evolution
Chicken
Fish
Human
Rabbit
Salamander