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Exploring Cells: Observations and Endosymbiotic Theory

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Analyze two cells, learn about the Golden Poison Dart Frog, Classwork and Homework Instructions, Understand Prokaryotic vs Eukaryotic cells with Endosymbiotic Theory, Exit Ticket to compare cell differences.

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Exploring Cells: Observations and Endosymbiotic Theory

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  1. Bellwork: September 4Look at the two cells below (A and B). Write at least 5 things you observe about these cells. (Example…tell me how they are similar or how they are different) Cell A Cell B

  2. Science Fact of the Day:The Golden "Poison Dart" frog in South America is most poisonous vertebrate in the world.

  3. Today…on pg 14 of your journal • If you didn’t do your homework… • Cornell notes over 183-186 • Answer questions 5 and 6 on pg 186 • Answer questions 1-8 on page 211 • If you did your homework  • Divide your paper into 8 sections. At each slide record the name, draw what you see, is it prokaryotic or eukaryotic (how do you know)

  4. Below your notes, number 1-6.With a partner, decide whether the cells on each slide are a prokaryotic or eukaryotic slide.Be sure to put a reason WHY you chose your answer.

  5. Prokaryotic or Eukaryotic?

  6. Prokaryotic or Eukaryotic?

  7. Prokaryotic or Eukaryotic?

  8. Prokaryotic or Eukaryotic?

  9. Prokaryotic or Eukaryotic?

  10. Prokaryotic or Eukaryotic?

  11. Answers: • Prokaryotic—no nucleus, no organelles • Eukaryotic—plant cells, green discs are chloroplasts (organelle) • Eukaryotic—complex, contains a nucleus, many organelles • Prokaryotic—small, simple, no organelles are seen • Prokaryotic—small, simple, no organelles are seen • Eukaryotic—unicellular, organelles present

  12. …on the top of the paper write “Endosymbiotic Theory”Only write what is in bold!

  13. Endosymbiotic Theory • “endo” = inside of • “sym” = together • “biotic” = living • “theory” = scientific explanation based on scientific evidence …Put that all together and you get…

  14. Endosymbiotic Theory • The theory that the eukaryotic cell is actually composed of prokaryotic cells • One prokaryotic cell living inside of another prokaryotic cell, made a more complex cell called the eukaryotic cell • Organelles were once independent prokaryotes

  15. Endosymbiotic Theory Prokaryotic Cell #1 Prokaryotic Cell #2 (chloroplast) NEW Eukaryotic Cell Prokaryotic Cell #1 Prokaryotic Cell #2 (mitochondria) NEW Eukaryotic Cell

  16. Endosymbiotic Theory Videos Endosymbiotic Clay-mation Endosymbiotic Theory: Big Tony and Little Jon

  17. Exit Ticket! • On your stickie note write 3 major differences between prokaryotic and eukaryotic cells. • You do not need to put your name on it!

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