-
(5 BYA) Solar System
solar system and sun begin to form -
(4.6 BYA) Earth
Earth begins to form -
(4 BYA) Atmosphere
Volcanic eruptions cause the formation of the atmosphere -
(4 BYA) Cellular Life
Archaea are thought to be similar to the types of cellular life that was first on the Earth -
(Between 2 BYA-1.5 BYA) First Eukaryotes
A type of small aerobic prokaryote began to live and reproduce inside a larger, anaerobic prokaryote -
(1953) Miller- Urey
experiments tests Oparin's hypothesis for conditions for formation of organic molecules using an appoattus with gases and electricity (simulated lightening) -
(3.5 BYA) Fossils
Fossils of stromatolites are known.
-lynbgya cells grow in colonies and form layed structures called stromatolies -
(3 BYA) Aerobic Respiration
chemical traits of photosynthetic activity -
(2.2 BYA) Earth
Earth is formed and resembles the Earth the way it is today -
(2 BYA) Oxygen
Oxygen levels reached today's levels -
(2 BYA- 1.5 BYA) Prokaryotes
a type of small aerobic prokaryotes began to live and reproduce inside of larger anaerobic prokaryotes -
(1 BYA) Ozone Formed
protected organisms from harmful UV rays so they could exist on land -
(1668) Redi
meat experiment
-rotting meat kept away from flies would not produce new flies
-maggots appeared only on meat that had been exposed to flies -
(1660's- 70's) First Microscope
the first microscope was in use -
(1700's) Spallanzani
boiled broth in flasks, sealed one flask, left the other open; sealed flask stayed clear, open flask became cloudy -
(1960's) Lynn Margulis
Margulis finds that bacteria and organelles are similar -
(1980's) Thomas Cech
Cech finds a type of RNA that can act as chemical catalyst (Ribosome) -
(1970's) Sydney Fox
researched early cell structures -
(present) Radiometric Dating
used to determine age of fossils by using the half-lives of particular elements -
(1920's) Oparin's Hypothesis
NH3, H2, H2O, and H/C compounds (CH4) formed simple organic compounds (amino acids). Compounds accumulated in H2O and went through complex chemical reactions (MACROMOLECULES) -
Between 1800-1900) Pateur
used a variation of Spallanzani's experiment to support that microorganisms are carried in the air and do not arise by spontaneous generation
experiement used a curve-necked flask but after one year, he broke the neck off and the broth became cloudy
