Chapter_25_Learning_Objectives

Chapter_25_Learning_Objectives - • Explain how...

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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. Describe the four stages of the hypothesis for the origin of life on Earth by chemical evolution. 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. Describe the evidence that suggests that RNA was the first genetic material. Explain the significance of the discovery of ribozymes. Concept 25.2: The fossil record documents the history of life Explain why the fossil record provides an incomplete chronicle of evolutionary change.
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Unformatted text preview: • Explain how radiometric dating can be used to determine the absolute age of rock strata. Concept 25.3: Key events in life’s history include the origins of singlecelled and multicelled organisms and the colonization of land • Describe the major events in Earth’s history from its origin until 2 billion years ago. In particular, note when Earth first formed, when life first evolved, and what forms of life excisted in each eon. • Describe the timing and significance of the evolution of anaerobic metabolism, oxygenic photosynthesis, and aerobic metabolism. • Explain the endosymbiotic theory for the evolution of the eukaryotic cell. Describe the evidence that supports this theory....
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