Anthro 1 Notes 3
mya : millions years ago
bya: billions grad
5 geologic time
o (mammals) cenozoic: new/ recent in forms
o Mesozoic : middle life forms
o Paleozoic: old life forms earliest invertebrates, fish. amphibians,
reptiles, mammal Erasmus Darwin " Crawl out of the ocean "
-dinosaurs extinct
o Cambrian:
cambria
o Precambrian: all the time that the earth exists before the
cambrian
7 Epochs: PEOMPPH: Put Eggs On My Plate Please, Holly Ocene
Precambrian
13.8 bya The Big Bang
o Hadean 4.6 Billion years ago
Solar system forms
earth comes into existence and solidifies over first 600
million years. Eon named after flades- Greek term for Hell.
Accretion :
Archaean
, o 4.0 billion years ago
o Continental plates form
o first life appears.
3.7 bya: fossil evidence of life
cyanobacteria single called autotrophic prokaryotes
o stromatolites - earliest fossil.
Life in a bottle ? - Millers apparatus ( trying to recreate
the earliest
o Miller: ATP, replicas of at least 3 different amino acids
o Calvin: Amino acids
o Fox: microspheres
Long chain peptides
o Oparin: same membrane – amino acids repeated
o Sagan: original cosmos
Microspheres: 70% of the way to forming RNA or DNA but not both a
thing called a virus - not alive
Proterozoic 2.5 BYA
commencement of multicellular life - metazoa
the path toward complexity of behavior - type of cell death, occurs
during mitoses - deficient cell cycle check points mitotic failure - go to
explanation consumption single-celled.
2 produce 2, 2 - 4, 4-4, 48, 8-8, 8.16 more efficient reproduction single
cell - has to do everything, can't do everything as well multiple cells - one
cell could specialize
o - cellular damage
2
, Cambrian - Age of the Invertebrates.
570 mya
o Trilobites abundant; also brachiopods, jelyfish, worms, and other
invertebrates
o sessile creatures fight for limited real-estate: development of
shells and exoskeletons, permanently affixed
Cnidarians are the most primitive eumetazoans
Ordovician
500 myd first fish ; trilobite's still abundant and corals becomes plentiful
graptolites
Vertebrate evolution
o mobility , velocity ( Fish possess endoskeleton) movement
through the water
Silurian 430 mya
Jawed fish appear
first airbreathing animals (insects) on land land plants definite - stronger
photonic energy from sunlight
Terrestrial food-chain 4x
Devonian
395 my2
age of fishes; first amphibians, first forests
o Amphibians develop lungs, stronger heart limbs.
o The Swamps of Canada & Pennsylvania bear evidence of fish-
amphibian transition Adaptive radiation
3
mya : millions years ago
bya: billions grad
5 geologic time
o (mammals) cenozoic: new/ recent in forms
o Mesozoic : middle life forms
o Paleozoic: old life forms earliest invertebrates, fish. amphibians,
reptiles, mammal Erasmus Darwin " Crawl out of the ocean "
-dinosaurs extinct
o Cambrian:
cambria
o Precambrian: all the time that the earth exists before the
cambrian
7 Epochs: PEOMPPH: Put Eggs On My Plate Please, Holly Ocene
Precambrian
13.8 bya The Big Bang
o Hadean 4.6 Billion years ago
Solar system forms
earth comes into existence and solidifies over first 600
million years. Eon named after flades- Greek term for Hell.
Accretion :
Archaean
, o 4.0 billion years ago
o Continental plates form
o first life appears.
3.7 bya: fossil evidence of life
cyanobacteria single called autotrophic prokaryotes
o stromatolites - earliest fossil.
Life in a bottle ? - Millers apparatus ( trying to recreate
the earliest
o Miller: ATP, replicas of at least 3 different amino acids
o Calvin: Amino acids
o Fox: microspheres
Long chain peptides
o Oparin: same membrane – amino acids repeated
o Sagan: original cosmos
Microspheres: 70% of the way to forming RNA or DNA but not both a
thing called a virus - not alive
Proterozoic 2.5 BYA
commencement of multicellular life - metazoa
the path toward complexity of behavior - type of cell death, occurs
during mitoses - deficient cell cycle check points mitotic failure - go to
explanation consumption single-celled.
2 produce 2, 2 - 4, 4-4, 48, 8-8, 8.16 more efficient reproduction single
cell - has to do everything, can't do everything as well multiple cells - one
cell could specialize
o - cellular damage
2
, Cambrian - Age of the Invertebrates.
570 mya
o Trilobites abundant; also brachiopods, jelyfish, worms, and other
invertebrates
o sessile creatures fight for limited real-estate: development of
shells and exoskeletons, permanently affixed
Cnidarians are the most primitive eumetazoans
Ordovician
500 myd first fish ; trilobite's still abundant and corals becomes plentiful
graptolites
Vertebrate evolution
o mobility , velocity ( Fish possess endoskeleton) movement
through the water
Silurian 430 mya
Jawed fish appear
first airbreathing animals (insects) on land land plants definite - stronger
photonic energy from sunlight
Terrestrial food-chain 4x
Devonian
395 my2
age of fishes; first amphibians, first forests
o Amphibians develop lungs, stronger heart limbs.
o The Swamps of Canada & Pennsylvania bear evidence of fish-
amphibian transition Adaptive radiation
3
