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.

The Egg Demo

How to fill in your notes:

Prokaryotes EukaryotesBOTH

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!

Cells fall into two broad categories depending on whether they contain a

nucleus.

Eukaryotes

The next few slides will go on the right side of your T-Chart under

“Eukaryotes”

ONLY write the information in BOLD!

Eukaryotes are…organisms with cells that contain a nucleus.

Eukaryotic cells are…larger and more complex

Eukaryotic cells…

• Have internal membrane-bound organelles.

• Have a nucleus.

Eukaryotes are… both unicellular or multicellular.

Eukaryotes can… reproduce sexually or asexually

• Asexual reproduction of a sea anemone by fission.

Eukaryotic examples…

1. Animals

2. Plants

3. Fungi

4. Protists

Prokaryotes

The next few slides will go on the left side of your T-Chart under

“Prokaryotes”

ONLY write the information in BOLD!

Prokaryotic Cells…

organisms that do NOT

contain a nucleus.

Prokaryotes are… smaller and simpler

Prokaryotic cells… do not have membrane-bound organelles.

Prokaryotes are… unicellular organisms.

Prokaryotes… reproduce asexually

Prokaryotic examples: bacteria.

WHEN I SAY PROKARYOTE,

YOU SAY BACTERIA!

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

Prokaryotic or Eukaryotic?

Prokaryotic or Eukaryotic?

Prokaryotic or Eukaryotic?

Prokaryotic or Eukaryotic?

Prokaryotic or Eukaryotic?

Prokaryotic or Eukaryotic?

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

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!