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Transcript
BIOL212 – First Test Topics – Evolution – Chap. 22 – 26 & 32
Weds. 18 April 2012
The Darwinian revolution challenged traditional views of a young Earth
inhabited by unchanging species
Descent with modification by natural selection explains the adaptations of
organisms and the unity and diversity of life
Evolution is supported by an overwhelming amount of scientific evidence
Genetic variation makes evolution possible
The Hardy-Weinberg equation can be used to test whether a population is
evolving
Natural selection, genetic drift, and gene flow can alter allele frequencies in
a population
Natural selection is the only mechanism that consistently causes adaptive
evolution
The biological species concept emphasizes reproductive isolation
Speciation can take place with or without geographic separation
Hybrid zones reveal factors that cause reproductive isolation
Speciation can occur rapidly or slowly and can result from changes in few
or many genes
Conditions on early Earth made the origin of life possible
1953, Stanley Miller and Harold Urey
The fossil record documents the history of life
Key events in life’s history include the origins of single-celled and multicelled organisms and the colonization of land
Abiotic to biotic
Origins of mitochondria and chloroplasts
The rise and fall of groups of organisms reflect differences in speciation and
extinction rates
BIOL212 – First Test Topics – Evolution – Chap. 22 – 26 & 32
Weds. 18 April 2012
Major changes in body form can result from changes in the sequences and
regulation of developmental genes
Evolution is not goal oriented
Animals are multicellular, heterotrophic eukaryotes with tissues that develop
from embryonic layers
The history of animals spans more than half a billion years
Animals can be characterized by “body plans”
New views of animal phylogeny are emerging from molecular data
Archaeopteryx
Words in bold print in Campbell Reese
Alu Intron investigation
How to use this guide:
This list is not exhaustive. Rather, it lists the major concepts we’ve
explored, so far. E.g., you would have to have a good grasp of the
morphological, ecological and phylogenetic species concepts, gene flow,
reproductive isolation and maybe hybridization to explain the biological
species concept.