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(5 B.Y.A) Event & Description of Geologic Events
Swirling mass of gas and dust -
(4.6 B.Y.A) Event & Description of Geologic Events
The age of planet earth -
(4 B.Y.A)Events & Description of Geologic Events
The oldest known rocks & crystals . -
(4 B.Y.A) Event & Description of life events
most cells were all heterotroph -
(3.5 B.Y.A) Event & Description of life events
fossils of stromatolites are known -
(3 B.Y.A) Event & description of life events
some porchs of life were photosynthetic -
(2.2 B.Y.A) Event & description of Geologic events
appeared similiar to todays world -
(2.2 B.Y.A) O2 levels reached todays levels
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(1.5 B.Y.A) Events & Description of life events
A type of small aerobic procaryote was engulfed by & began to live & reproduce inside a larger, anerobic prokaryote . -
(1 B.Y.A) Ozone(o3) formed-protected organisms from harmful uv rays so they could exist on land
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Redi
noticed & described different developmental forms of life -
first microscopes
instrumental using optical lenses to magnify objects by bending light rays -
Spallanzani
Designed an experiment to test the hypothesis of spontaneous generation of microorganisms -
Pasteurs
Made a curve-necked flask that allowed air inside the flask to mix w/ air outside the flask -
Fox
extensive research on physical structures that gave rise to first cells -
Thomas Cech
type of RNA found in some unicellular Eukaryotes act as a chemical catalyst -
Oparin
thought early atmosphere contained ammonia,NH3; hydrogen gas,h2; water vapor, h2o. high temperatures gases might form amino acids . -
Radiometric Dating
establishing the age of materials including the -
Urey & Miller
produced a variety of organic compounds, including amino acids . -
Margulis
proposed that early prokaryotic cells may have developed a mutual beneficial relationship