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Evolution (Evidence (Strucutral (homologous structures (arm bones in…
Evolution
Evidence
Direct observation
natural selection in bacteria
ex: antibiotic resistance
Fossils
bones, shells, leaves
give us a record
mass extinctions
species splitting
gradual evoluation
specific feature like femur bones
MIcrobio/genetics
all life had DNA
similar DNA too
Strucutral
homologous structures
arm bones in humans, birds, dogs, whales
fossil record
embryonic development
Apes 7 mya
walk on 2 legs
Genus Homo
Homo Habilis 2.3-1.4 mya
Homo Erectus 1.8-1.3 mya
Neanderthals 600-300 kya
disappeared 30k
Homo Sapiens
200 kya
3.2 mya Lucy (Austalopithicines)
modern chimpanzees
modern gorillas
First life 3.8-4bya
prokaryotes, anaerobes
bacteria, archaea
3.5 bya photosynthesis
oxidized w/ cyanobacteria in ocean
O2 starts to accumulate
2.3bya enough O2 for eukaryotes
O2 reacts w/ atmosphere to become ozone
1st life on land
1.5bya algae on coastal rocks
530 mya coastal slugs
475mya plants
428mya 1st animals (myriapods)
Humans
70 mya dinosaurs
65 mya wiped out by meteor
appeared after that
maybe from moles lol