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Population Genetics and Evolution (Evolution and the Origin of Life…
Population Genetics and Evolution
Population Genetics
Factors that Cause the Gene Pool to Change
mutations
accidents
artificial selection
natural selection
Speciation
Divergent Speciation
species evolve into
parental species
Convergent Evolution
Phyletic Speciation
so changed
becomes new species
Evolution and the Origin of Life
Aggregation and Organization
fatty acids
oil slicks in quiet water
or as droplets in agitated water
occupied outermost layer
interior layer
hydrophobic
first aggregates
formed random
Early Metabolism
heterotrophs
all from ocean
Formation of Polymers
high concentration of monomers
clays
concentrated monomers
first primitive catalysts
oxygen
allowed world to rust
evolution of aerobic respiration
oxidizing atmosphere
addition of oxygen
via photosynethesis
Chemicals produced Chemosynthetically
S. Miller
plausible model
solution tested
had organic compounds
tested rock samples
from space
The Presence of Life
inorganic compounds to bacteria
Conditions on Earth Before the Origins of Life
second atmosphere
produced by gases
rock matrix
bombardment of meteorites
reducing atmosphere
lack of oxygen
presence of reducing agents
Rates of Evolution
populations
well adapted
