-
(5 BYA)
Solar sytems is swirling mass of Gas and Dust. -
(4.6 BYA)
Planets form through repeated collisitions with space debri. -
(4 BYA)
Half of carbon 14 in a sample would have decayed.
Organic molecules (methanricna baruic) begin to accumulate.
Earths Age -
(3.5 BYA)
Lynbgya & Stromolites form -
(3 BYA)
Photosynthetic activity begins. -
(2.2 BYA)
Earth looked much like it does today. -
(2 BYA)
Oxygen levels reach todays levels. -
(1.5 BYA)
A type of small aerobic prokaryote was engulfed by & began to live & reproduce inside of a larger anerobic prokaryote. -
(1 BYA)
Ozone formed and protected organism from harmful UV rays so they could exist on land. -
(1600-1700)
Redi's Experiments - Showed that life comes from other living oprganism. Experiment: Fly & Meat
1665 - First Light Microsocpe, used obtical lens to magnifiy object by bending light rays
Robert Hooke was the inventor. -
(1900-present)
Sidney Fox - Research on physical structure has given rise to the first cells.
Thomas Cech - Found types of RNA that is able to act as a chemical catalyst, similar to the way an enzymes.
Lynn Marguis - She proposed that cells early prokaryotic may have been developed mutially beneficial relationship.
1950's - Radio Active Dating is used, which recalls the atomic number of the element, helps to see how old an object is due to radio active decay -
(1700-1800)
Spallanazani's Experiment - microrganims wouldn't grow in broth when it's container was heated & then sealed. Microrganism do not arise spontaneously, they are carried through the air.
Experiment: Broth in Flask, one sealed right away, the other left open.
People still did not agree. -
(1800-1900)
Urey & Miller - Experiment has produced a variety of organic compunds & amino acids
Opann's hypothesis - Chemical reactions fueled by energy from lightnight and ultraviolet radiation would result in the macromolecules essential to life(proteins)
Pasture's Experiment - He curved the neck of a flask and broth stayed clear, when he broke the neck it became cloudy.