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Chapter 18 Population Genetics and Evolution, Chemicals produced started…
Chapter 18 Population Genetics and Evolution
Specification
Divergent Speciation
Abiological Reproductive Barriers
abiotic thing that prevents population gene exchange
Biological Reproductive Barriers
biological prevention of gene flow
Adaptive Radiation
rapidly diverging species
Convergent Evolution
same habitat, different species
similar appearance
Phyletic Speciation
Seed disperal
animals spread seeds by incomplete digestion
migration
humans
Vegetative Propogation
small peices
Pollen Transfer
haploid
Evolution and the Origin of life
Aggregation and organization
components into masses
Early Metabolism
heterotrophs
rapid metabolism
rapid reproduction
Formation of Polymers
concertation of monomers
Oxygen
areobic resperation
Chemicals produced Chemeosynthetically
#
amino acids
sugars
lipids
nitrogen bases
The presence of life
Conditions on the Earth before the Origins of Life
Energy Sources
light
heat
Time availbe for the origin of life
infinate
Chemicals Present in the Atmosphere
second atmosphere
reducing atmophere
Concepts
natural selection
#
survival of the fittest
Evolution
species to species
new species
Rates of Evolution
Hawiian Asters
1 ever 500,000
species exist for MOY and do not change
Population Genetics
Situations in which Natural Selection Does Not Operate
new habitats
Multiple Selection Pressures
illness
inscet attack
drought
cold
absence of pollinators
seed dispersal
metabolistic efficiency
Factors That Cause The Gene Pool to Change
Mutation
new alleles
Accidents
no adaptations
Natural selection
survival of the fittest
progeney must have different alleles
more offsprong than can survive
Artifical Selection
humans change the gene pool
food or appearance
Factors that are not part of natural selection
#
prpose
intention
planning
decision making
Chemicals produced started origin
Natural selection features
Issues
