BIOL 1201 Chapter : Biology 1201 How Life Began
Document Summary
Hypothesis is based on observations or an educated guess. A theory is gathered over years of research supported with evidence. We know that this is the only planet where life and evolution took place. We have no evidence to say that it began anywhere else. Charles darwin talked about how life changed, not began. One hypothesis that describes how life began: people thought that new living things appeared all the time a hundred years ago. People thought that everything came out of the basic elements Louis pasteur (spontaneous generation refuted mid 1800"s)- broth in flask is boiled to kill preexisting microorganisms. As the broth cooled, condensing water sealed the mouth of the flask. If neck is later broken off, outside air can carry microorganisms into the broth. Disproved the theory of spontaneous generation of life, but it must have happened about 4. 1-4. 2 billion years ago.
