Origins of Life-1.2

Origins of Life-1.2 - Origins of Life 1. How did Life on...

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Origins of Life 1. How did Life on Earth Begin? a. Miller-Urey experiment – membrane b. RNA world 2. History of Life on Earth a. Dating ancient events b. How life on Earth has changed over time c. Major events in Life’s History 3. Organizing Life’s Diversity a. Classification System b. Tree of Life 1. How did Life on Earth Begin? a) Miller-Urey experiment (i) Atmosphere of early earth 1. Early atmosphere had no Oxygen, it DID have hydrogen gas, ammonia, methane gas, and water vapor. CHAPTER ONE EXPERIMENT: Miller-Urey experiment. 2. Generation of simple biological molcules: a. Amino acids b. Purines c. Pyrimidines (ii) The Miller-Urey experiment included- carbon dioxide, methane, water vapor, ammonia with lightening b) RNA World (i) What components are necessary for life? c. “RNA World” hypothesis - CAME FIRST i. Single strand ii. Nucleic acids: A, C, G, U iii. Only need to be translate iv. RNA can form ribosome- which can catalyze these reactions d. DNA- CAME SECNOND i. 2 strands ii. requires enzymes to catalyze these reactions iii. AKA MORE COMPLICATED THAN RNA Keywords: RNA (ribonucleic acid), DNA, Miller-Urey 2. History of Life on Earth
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Origins of Life a) Dating ancient events Relative age vs. absolute age- relative is comparing it to another thing. EX. Im younger than my professor. Absolute is the exact age. EX. I am 19 Radiometric dating- absolute dating Carbon dating - for organic remains, ½ life of 5700 years, good for
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Origins of Life-1.2 - Origins of Life 1. How did Life on...

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