Chapter_25_Learning_Objectives - Learning Objectives...

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Learning Objectives Chapter 25: The History of Life on Earth Concept 25.1: Conditions on early Earth made the origin of life possible Describe the atmospheric composition of the early Earth. o Methane, carbon dioxide, ammonia, water o NO FREE OXYGEN** Describe the four stages of the hypothesis for the origin of life on Earth by chemical evolution. o Anaerobic o Photosynthesis o Production of oxygen o Aerobic Describe the contribution that Miller and Urey made towards developing a model for the abiotic synthesis of organic molecules. Describe the conditions and locations where most of these chemical reactions likely occurred on the early Earth. o They proved how inorganic molecules were converted to organic molecules with “simulated lightening” Earth prior to life was a reduced atmosphere o Frequent volcanic eruptions, storms and lightening….no ozone so a lot of UV rays, meteorites Describe the evidence that suggests that RNA was the first genetic material. Explain the significance of the discovery of ribozymes.
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This note was uploaded on 02/26/2009 for the course BIOL 1202 taught by Professor Gregg during the Spring '08 term at LSU.

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Chapter_25_Learning_Objectives - Learning Objectives...

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