1 / 22

11/10/10 – “F” Day

11/10/10 – “F” Day. Objective: To understand how life evolved from coacervates to complex multicellular creatures. Do Now: What molecules were necessary for life to exist? Today: Complete Geologic Timeline Activity Early Earth and Evolution Notes

brie
Download Presentation

11/10/10 – “F” Day

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. 11/10/10 – “F” Day • Objective: To understand how life evolved from coacervates to complex multicellular creatures. • Do Now: What molecules were necessary for life to exist? • Today: • Complete Geologic Timeline Activity • Early Earth and Evolution Notes • HW – Webquest to be completed by Monday, working at library later this week!

  2. 11/12/10 – “B” Day • Objective: To understand how life evolved from coacervates to complex multi-cellular creatures. • Do Now: What were the first living organisms like? • Today: • Geologic Timeline/Rock Strata Data • Big Bang to Eukaryotic Cell Activity • HW – Webquest to be completed by Monday, working at library later this week!

  3. 11/15/10 – “C” Day • Objective: To understand how life evolved from coacervates to complex multi-cellular creatures. • Do Now: Get out John Kyrk Evolution Questions – Any Questions? • Today: • John Kyrk Evolution – HW Quiz • IRP Logbook Expectations • Early Earth Notes • Which Came First Activity

  4. 11/16/10 – “D” Day • Objective: To understand how life evolved from coacervates to complex multi-cellular creatures. • Do Now: How did coacervates (cells) change over time? • Today: • STATS help announcement • Finish Notes • Earth History – Evolution of Coacervates Activity

  5. 11/17/10 – “E” Day • Objective: To understand how life evolved from coacervates to complex multi-cellular creatures. • Do Now: Which came first (Explain) chemical evolution or evolution of life? • Today: • STATS help today after school • Origin of Life

  6. 11/18/10 – “F” Day • Objective: To understand how life evolved from coacervates to complex multi-cellular creatures. • Do Now: • Today: • Complete Origin of Life • Discuss/Read Margulis Article Tomorrow:Eukaryotic vs. Prokaryotic – Microscope Inquiry Lab

  7. 11/22/10 – “B” Day • Objective: To compare the structures of prokaryotic and eukaryotic cells • Do Now: • What is a prokaryote? A eukaryote? • Today: • Microscope Lab!

  8. 11/23/10 – “C” Day • Objective: To compare the structures of prokaryotic and eukaryotic cells • Do Now: • On Low power…what is thediameter of thismicrobe? • Today: • Continue Microscope Lab!

  9. “I have… You have…” Earth (Life) History

  10. 1. The Big Bang Theory 14 Billion Years ago • Currently accepted explanation for beginning of universe • Based on the theory of relativity • Cosmic Explosion (“BIG BANG”) - universe has been expanding and cooling since then • * Supporting evidence: Cosmic background radiation

  11. 2. Cosmic dust and gas condense forming planets and stars. • Planet Earth forms! 4.6 BYA Gases are released from volcanoes, etc.. Atmosphere created

  12. 3. Reducing Atmosphere - held in place by gravity. • Contains N2 (Nitrogen gas) , CO2, H2O, and maybe H2S (hydrogen sulfide), NH3 (ammonia) and CH4 (methane). • There was no O2 or O3 • Earth Surface  U.V.

  13. 4. UV radiation chemical evolution • Warm oceans • lots of N2, H2S, NH3 Organic Soup •  energy

  14. 5. Organic Soup • a.a., lipids, & carbs clump together in a primitive organization = COACERVATES • Predecessors to the first true cells

  15. 6. Advanced Coacervates • Use RNA to make copies = REPRODUCTION

  16. 7. Reproduction  1st cells • 3.5 BYA All first cells • Archaebacteria • Prokaryotes - “ Before nucleus” • Anaerobes

  17. 8. Archeabacteria - advanced • 3-2.5 BYA • Chemoautotrophs • Photosynthesis by cyanobacteria releases O2 in atmosphere

  18. 9. Oxidizing atmosphere (21% O2) • 2.5 BYA • many archeobacteria go extinct • O3 UV shield • O2  Aerobic respiration

  19. 10. Aerobic Respiration • Efficient energy for cells • New cell design = EUKARYOTIC CELLS • “advanced” cells with nuclei

  20. 11. Eukaryotic cells • 1.5 BYA • Theory of Endosymbiosis - Big cells engulf and incorporate small cells as organelles. • Remember Dr. Jeon’s Amoeba’s?? • Archeabacteria  organelles • Cells are now more complex and diverse.

  21. 12. Multicellular Organisms • 0.57 BYA • Specialization of cells

More Related