1 / 22

10-19-11 Wednesday

Learn about prokaryotic cells and their characteristics. Explore the bacteria E.coli and the historical impact of the bubonic plague. Discover the differences between prokaryotic and eukaryotic cells in this engaging science lesson.

nyan
Download Presentation

10-19-11 Wednesday

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. 10-19-11 Wednesday • Today’s Topic: • Prokaryotic Cells – Bacteria (e.coli, bubonic plague) • Tomorrow and Friday: Viruses • Make sure you have your science notebooks out!

  2. There are 2 types of cells EUKARYOTE PROKARYOTE

  3. Eukaryotic Cells • Animals, plants, and fungi are eukaryotes • Eukaryotes areorganisms whose cells are organized into complex organelles.

  4. Prokaryotic Cells • Bacteria and prokaryotes • Prokaryotes are unicellular (one celled) organisms that lack a nucleus and most organelles.

  5. Huge Size Difference! Prokaryotic Cells are TINY! Eukariotic Cells are BIGGER!

  6. Actual Prokaryotic Cells

  7. Which organelles is the Prokaryote cell missing?

  8. Artist’s illustration of a Prokaryote and Eukaryote Cell Which type of cell is more complex?

  9. Major Takeaways • Prokaryotes do NOT have a nucleus • They have one strand of DNA that just floats around • They lack MOST organelles • Prokaryotes are WAY more simple than eukaryotes

  10. What Is Bacteria? • Bacteria are tiny, one-cell creatures that get nutrients from their environments in order to live.

  11. Are All Bacteria Bad? • No, some are very helpful (Ex: There are bacteria in your stomach that help break food down) • Only some bacteria are harmful- Bacterial infections can be treated with antibiotics

  12. E. coli • Found in the intestines of mammals • Many types • Most harmless/helpful--produce vitamins • Some cause “food poisoning”

  13. Staph infection • Scientific name: Staphylococcus aureus • 20-30% of the population carry staph on their skin • Only becomes a problem when it gets into a cut or out of control

  14. Diseases caused by Staph infections: • Minor diseases: pimples, impetigo, boils, scalded skin syndrome, abscesses

  15. Bubonic Plague: “Black Death” • Caused by bacteria, carried by fleas which are carried by rats • Infects the immune system • Key symptoms: buboes (bulges from swollen lymph nodes), delirium, vomiting, headaches, bleeding lungs

  16. A bacterium, carried by fleas which are carried by rats

  17. Black death epidemic • Killed approximately 1/3 of the European population in the 1300-1400s • Traveled and spread quickly

  18. Ring Around The Rosie • Ring around the Rosie • Pocket full of posy • Ashes, Ashes • We all fall down • (Ring around the rosie, what do you suppose we can do to fight the darkness in which we drown. Ring around the rosie, this evil thing it knows me, lost ghosts surround me, I can't fall down)

  19. Plague still exists, but is easily identifiable and can be cured with antibiotics.

  20. Other Life-threatening diseases Caused By Bacteria: pneumonia, meningitis

  21. “Flesh Eating Disease”

More Related