Preview Questions (lecture 3)

Preview Questions (lecture 3) - Lecture 3 The Origin of...

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Lecture 3: The Origin of Life. Questions you should be able to answer after today’s lecture. You do NOT have to memorize any chemical structures, dates or names, other than Louis Pasteur. 1. What is spontaneous generation? a. New life forming spontaneously and not from existing life. 2. How did Louis Pasteur show that microorganisms do not arise spontaneously? a. He used his swan-shaped flask that allowed air, but not microbes to pass and repeated Needhan’s and Spalanzani’s experiment. No microbes were present. b. Allowed free movement of air c. Inhibited free movement of microbes d. Sterilization prohibited the movement of microbes—result was no growth of microbes [how does the shape of the flask relate to his experiment??] e. Pasteurization is, therefore, best described as?? Sterilization 3. What is Occam’s razor? a. Make fewest number of hypothesis as possible. 4. Describe the big bang. a. Around 13 billion years ago everything was thought to have exploded from an infinitesimally tiny and hot point at time zero.
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