-
Our solar system was a "swirling mass of gas and dust". The beginning before Earth formed
-
Earth began to form into a planet. The debris was pulled together by collisions of debris.
-
Earth was actually formed into a planet that would soon support life. Radiometric dating allows us to figure out when these events happened on Earth.
-
The fossils provide proof that organsims actually did exist billions of years ago.
-
Photosynthetic life provides oxygen to other organisms on Earth.
-
Oxygen had a damaging effect on anaerobic organisms, the bonding of oxygen prevented this from happening.
-
The oxygen levels we need to survive today reached this point two billion years ago. Allowing life to live on Earth.
-
Provided a mutally beneficial relationship for the prokaryotes to survive on Earth.
-
Endosymbiosis may have led to the evolution of mitochondria and chloroplasts, which are essential to life.
-
The ozone layer was important for life on earth. It proctected organisms from harmful UVA rays, that could damage DNA.
-
-
Oparin, along with John B. S. Haldane thought that the atmoshpere contained ammonia, NH3, hydrogen gas, H2, water vapor, H2, and compounds made of hydrogen and carbon
-
Harold C. Urey set up an experiment based on the findings of Oparin. He, in a way, created lightning inside a gas chamber and used the energy to conduct chemical reactions. These experiments led to production of many organic compounds.
-
Redi put meat in jars and covered some of them to prove that maggots could only form on meat that flies had previously landed on, going against the theory of spontaneous generation.
-
Lazzaro Spallanzani boiled broth in two different flasks and then covered one of them. He observed that the open flask became cloudy with microorganisms while the closed flask was clear.
-
Sidney Fox did extensive research on physical structures that may have given rise to the first cells.
-
Cech used the term ribozyme for an RNA molecule that can act as a catalyst and promote a specific chemical reaction
-
Lynn Margulis hypothesized that cellular organelles were the result of symbiosis (one organism lives inside another). She believes that mitochondria and chloroplasts were originally separate organisms that became a part of larger cells.
-
Robert Hooke used a light microscope to discover cork cells
-
Pasteur proved that spontaneous generation was not a possiblity because of his experiment involving a curve-necked flask. When he used the curve-necked flask, the broth inside of it did not spoil. When he broke the top off of it however, the broth spoiled. This proved that the broth was not being altered by a "vital force", but rather the debris falling in it from the top.
