intro_evolution

intro_evolution - ago – Fossil record is not complete,...

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Introducing Evolution
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Objectives: SOL BIO.8a-d TSW investigate and understand how populations change through time, including: Examining fossil records
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Fossils Any evidence of an organism that lived long ago.
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Types of Fossils Cast Mold Trace fossils Imprints Petrified fossils Frozen or Amber
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Dating Fossils Relative Dating Rock layers are put down in order Oldest on bottom, youngest layers on top Radiometric Dating Carbon-14 (50,000 years or less) Potassium-40 (1.3 billion years – 50,000 years)
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Why Use Fossils? Scientists have used the fossil record to construct a history of life on Earth. Earth’s life forms appeared 3.5 billion years
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Unformatted text preview: ago – Fossil record is not complete, but pretty good for general information The Origin of Life on Earth Abiogenesis – life from non-living things – Disproven by Redi and Pasteur Primordial Soup – natural processes formed early organic compounds – Miller-Urey experiment Bubble Theory – formed protocells – Stanley Fox Redi & Pasteur The Origin of Cells Prokaryotes – Archaebacteria (1 st cells) Eukaryotes – endosymbiont hypothesis – Separate DNA in chloroplasts and mitochondria – Both organelles the same size and shape of bacteria...
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This note was uploaded on 11/09/2011 for the course BIO 110 taught by Professor Harmon during the Winter '11 term at BYU.

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intro_evolution - ago – Fossil record is not complete,...

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