1 / 9

Introducing Evolution

Introducing Evolution. Objectives: SOL BIO.8a-d. TSW investigate and understand how populations change through time, including: Examining fossil records. Fossils. Any evidence of an organism that lived long ago. Types of Fossils. Cast Mold Trace fossils Imprints Petrified fossils

rafiki
Download Presentation

Introducing Evolution

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Introducing Evolution

  2. Objectives: SOL BIO.8a-d • TSW investigate and understand how populations change through time, including: • Examining fossil records

  3. Fossils • Any evidence of an organism that lived long ago.

  4. Types of Fossils • Cast • Mold • Trace fossils • Imprints • Petrified fossils • Frozen or Amber

  5. 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)

  6. 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 ago • Fossil record is not complete, but pretty good for general information

  7. 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

  8. Redi & Pasteur

  9. The Origin of Cells • Prokaryotes – Archaebacteria (1st cells) • Eukaryotes – endosymbiont hypothesis • Separate DNA in chloroplasts and mitochondria • Both organelles the same size and shape of bacteria

More Related