BIOL 1201 Midterm: EXAM 1
8 Dec 2015
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How did life begin? that prove this you see. 4. 2 billion years ago, it"s an explanation. Hypothesis based on a education guess, an explanation based on what. We have no evidence that life began anywhere else: people thought that new living things appeared all of the time. Broth in flask is boiled to kill preexisting microorganisms. As broth cools, condensing water collects, sealing the mouth of the flask. If neck is later broken off, outside air can carry microorganisms into broth. He showed the microbes going into the source did not exist. Spontaneous generation does not happen today but happened when. Many people used to believe that people in spontaneous generation life began. Things are not set in stone, they change. Conditions on early earth: photosynthesis, (photosynthesis was evolved) Atmosphere: earth has oxygen, about 20%, comes from. Our oxygen is similar to jupiter today.
