Origin of Cells

Origin of Cells - Cells - Lecture objectives To describe...

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Cells - Lecture objectives To describe historically, competing theories for the origin of life To understand major steps in the evolution of a cell To understand the major steps in an evolving world To begin to understand how cells work? http://multimedia.mcb.harvard.edu/media.html
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Where did cells (life) come from? Historical Ideas: Special Creation? Spontaneous Generation?  Outer Space?  Abiogenesis?
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First life on Earth 1. How to obtain energy? Metabolism chemical vs light energy 1. How to replicate?  RNA / DNA   Proteins
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Abiogenesis Abiogenesis : life from non-life : life from non-life Basic Premise: Life Evolved on Earth Organic life in stages hypothesis: 1.Abiotic Synthesis of monomers 2.Abiotic Synthesis of polymers 3.Origin of self-replicating molecules 4.Packaging into pre-cells
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The Early Atmosphere The Early Atmosphere A Reducing Atmosphere: A Reducing Atmosphere: Things Combine with Hydrogen Things Combine with Hydrogen NH NH 3 3 H H 2 2 S S H H 2 2 CH CH 4 4 H H 2 2 O O
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This note was uploaded on 05/23/2011 for the course BIO 101 taught by Professor Lanno during the Spring '08 term at Ohio State.

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Origin of Cells - Cells - Lecture objectives To describe...

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