Microevolution vs macroevolution Flashcards
microevolution
evolution within a species; evolution of a population
macroevolution
evolution of a new species and diversity of clades
4 evolutionary processes
mutation
genetic drift
natural selection
gene flow
gradualism
slow, constant change, in allele frequencies, (darwins belief)
stasis
no change
punctuated equilibrium
rapid diversification over short period of time
transitional form
evidence of gradualism (whales gradually losing their legs and species living with modified body)
Four Eons in Earths History
Hadean-
Archaean- Precambrian
Proterzoic -
Phanerozoic
Hadean
Newly formed Earth
- lots of volcanism
- frequent collisions with objects from space
- partially molten surface
- no oxygen
- no ozone
- first liquid water
- formation of first oceans
- moon formation
- solid crust - end of Hadean era
Archaean -ancient
atmosphere of methane
toxic to life today
first evidence of life 3.5 billion years ago
first photosynthetic cells -cyanobacteria
first prokaryotes-bacteria and archea
Proterozoic
first evidence of Eukaryotes accumulation of oxygen in atmosphere BIFs- banded iron formations distinctive bands in sedimentary rock algae changed the game/rule the world first multicellular organism
Endosymbiotic theory
evolutionary theory which explains the origin of eukaryotic cells from ancestral prokaryotes.
REVIEW ENDOSYMBIOTIC THEORY
REVIEW ENDOSYMBIOTIC THEORY
Primary Literature
Abstract introduction methods results discussion literature cited
