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HELLO! When you arrive to class today…
1. Have your notes from last night’s homework video on your desk!
2. Be able to answer the question, “why are cells small?” if it’s asked of you.
Bellwork: September 4
Look 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
Science Fact of the Day:The Golden "Poison Dart" frog in South America
is most poisonous vertebrate in the world.
CO: I will compare and contrast types of cells.
LO: I will complete a T-Chart to compare/contrast prokaryotic and eukaryotic cells. I will look at types
of cells with a partner.
Six characteristics that all cells have in common:
1. Surrounded by a cell membrane.
2. Have ribosomes (make proteins)
3. Contain DNA4. Have the ability to reproduce5. Maintain homeostasis6. Respond to stimuli
Write this in the “BOTH” column!
Eukaryotes
The next few slides will go on the right side of your T-Chart under
“Eukaryotes”
ONLY write the information in BOLD!
Prokaryotes
The next few slides will go on the left side of your T-Chart under
“Prokaryotes”
ONLY write the information in BOLD!
Flip your notes over…
…on the top of the paper write “Endosymbiotic Theory”
Only write what is in bold!
Endosymbiotic Theory
• “endo” = inside of• “sym” = together• “biotic” = living• “theory” = scientific explanation based on
scientific evidence
…Put that all together and you get…
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
Endosymbiotic TheoryProkaryotic Cell #1
Prokaryotic Cell #1
Prokaryotic Cell #2
(mitochondria)
Prokaryotic Cell #2
(chloroplast)
NEW Eukaryotic Cell
NEW Eukaryotic Cell
Endosymbiotic Clay-mation
Endosymbiotic Theory: Big Tony and Little Jon
Endosymbiotic Theory Videos
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. The team to get
the most right will get a prize
Answers:1. Prokaryotic—no nucleus, no organelles2. Eukaryotic—plant cells, green discs are
chloroplasts (organelle)3. Eukaryotic—complex, contains a nucleus,
many organelles4. Prokaryotic—small, simple, no organelles are
seen5. Prokaryotic—small, simple, no organelles are
seen6. Eukaryotic—unicellular, organelles present