BIOL 1201 Lecture : Biology Notes
Document Summary
Began 4. 6 billion years ago- hypothesis - means you have evidence to support explanation based on an observation. There are usually two hypothesis but one is more probable than the other. Charles darwin talked about change not how life began; natural selection. Hypothesis how life began: a few centuries ago (based on observation: people thought that new living things appeared all of the time (true but based on limited observation, 1609- monks- life comes out of the basic elements. They came up with stories but due to technological advancement we know better. Spontaneous generation refuted: mid 1800s louis pasteur (famous for pasteurizing milk, experiment to disprove this hypothesis: took a nutrient rich broth in flask is boiled to kill preexisting microorganisms. As broth cools, condensing water collects, sealing the mouth of the flask. If neck is broken off and air carries inside, the solution became inhabited by something alive but that was because it was coming from another source.
